DuiLib窗口增加阴影效果
2015-08-24 14:10
786 查看
DuiLib的创建的窗口如果不带Windows的边框,自己定义“最小化”,“最大化/还原“,”关闭“按扭,是没有阴影的。
这是我几个月前找到的,忘记来源了,粘贴在这里。
这是我几个月前找到的,忘记来源了,粘贴在这里。
WndShadow.h:
// WndShadow.h : header file // // Version 0.1 // // Copyright (c) 2006 Perry Zhu, All Rights Reserved. // // mailto:perry@live.com // // // This source file may be redistributed unmodified by any means PROVIDING // it is NOT sold for profit without the authors expressed written // consent, and providing that this notice and the author's name and all // copyright notices remain intact. This software is by no means to be // included as part of any third party components library, or as part any // development solution that offers MFC extensions that are sold for profit. // // If the source code is used in any commercial applications then a statement // along the lines of: // // "Portions Copyright (c) 2006 Perry Zhu" must be included in the "Startup // Banner", "About Box" or "Printed Documentation". This software is provided // "as is" without express or implied warranty. Use it at your own risk! The // author accepts no liability for any damage/loss of business that this // product may cause. // ///////////////////////////////////////////////////////////////////////////// //**************************************************************************** #pragma once #include "map" class CWndShadow { public: CWndShadow(void); public: virtual ~CWndShadow(void); protected: // Instance handle, used to register window class and create window static HINSTANCE s_hInstance; // Parent HWND and CWndShadow object pares, in order to find CWndShadow in ParentProc() static std::map<HWND, CWndShadow *> s_Shadowmap; // typedef BOOL (WINAPI *pfnUpdateLayeredWindow)(HWND hWnd, HDC hdcDst, POINT *pptDst, SIZE *psize, HDC hdcSrc, POINT *pptSrc, COLORREF crKey, BLENDFUNCTION *pblend, DWORD dwFlags); static pfnUpdateLayeredWindow s_UpdateLayeredWindow; HWND m_hWnd; LONG m_OriParentProc; // Original WndProc of parent window enum ShadowStatus { SS_ENABLED = 1, // Shadow is enabled, if not, the following one is always false SS_VISABLE = 1 << 1, // Shadow window is visible SS_PARENTVISIBLE = 1<< 2 // Parent window is visible, if not, the above one is always false }; BYTE m_Status; unsigned char m_nDarkness; // Darkness, transparency of blurred area unsigned char m_nSharpness; // Sharpness, width of blurred border of shadow window signed char m_nSize; // Shadow window size, relative to parent window size // The X and Y offsets of shadow window, // relative to the parent window, at center of both windows (not top-left corner), signed signed char m_nxOffset; signed char m_nyOffset; // Restore last parent window size, used to determine the update strategy when parent window is resized LPARAM m_WndSize; // Set this to true if the shadow should not be update until next WM_PAINT is received bool m_bUpdate; COLORREF m_Color; // Color of shadow public: static bool Initialize(HINSTANCE hInstance); void Create(HWND hParentWnd); bool SetSize(int NewSize = 0); bool SetSharpness(unsigned int NewSharpness = 5); bool SetDarkness(unsigned int NewDarkness = 200); bool SetPosition(int NewXOffset = 5, int NewYOffset = 5); bool SetColor(COLORREF NewColor = 0); protected: //static LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam); static LRESULT CALLBACK ParentProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam); // Redraw, resize and move the shadow // called when window resized or shadow properties changed, but not only moved without resizing void Update(HWND hParent); // Fill in the shadow window alpha blend bitmap with shadow image pixels void MakeShadow(UINT32 *pShadBits, HWND hParent, RECT *rcParent); // Helper to calculate the alpha-premultiled value for a pixel inline DWORD PreMultiply(COLORREF cl, unsigned char nAlpha) { // It's strange that the byte order of RGB in 32b BMP is reverse to in COLORREF return (GetRValue(cl) * (DWORD)nAlpha / 255) << 16 | (GetGValue(cl) * (DWORD)nAlpha / 255) << 8 | (GetBValue(cl) * (DWORD)nAlpha / 255); } };
WndShadow.cpp:
// WndShadow.h : header file // // Version 0.1 // // Copyright (c) 2006 Perry Zhu, All Rights Reserved. // // mailto:perry@live.com // // // This source file may be redistributed unmodified by any means PROVIDING // it is NOT sold for profit without the authors expressed written // consent, and providing that this notice and the author's name and all // copyright notices remain intact. This software is by no means to be // included as part of any third party components library, or as part any // development solution that offers MFC extensions that are sold for profit. // // If the source code is used in any commercial applications then a statement // along the lines of: // // "Portions Copyright (c) 2006 Perry Zhu" must be included in the "Startup // Banner", "About Box" or "Printed Documentation". This software is provided // "as is" without express or implied warranty. Use it at your own risk! The // author accepts no liability for any damage/loss of business that this // product may cause. // ///////////////////////////////////////////////////////////////////////////// //**************************************************************************** #include "StdAfx.h" #include "WndShadow.h" #include "math.h" #include "crtdbg.h" // Some extra work to make this work in VC++ 6.0 // walk around the for iterator scope bug of VC++6.0 #ifdef _MSC_VER #if _MSC_VER == 1200 #define for if(false);else for #endif #endif // Some definitions for VC++ 6.0 without newest SDK #ifndef WS_EX_LAYERED #define WS_EX_LAYERED 0x00080000 #endif #ifndef AC_SRC_ALPHA #define AC_SRC_ALPHA 0x01 #endif #ifndef ULW_ALPHA #define ULW_ALPHA 0x00000002 #endif CWndShadow::pfnUpdateLayeredWindow CWndShadow::s_UpdateLayeredWindow = NULL; const TCHAR *strWndClassName = _T("PerryShadowWnd"); HINSTANCE CWndShadow::s_hInstance = (HINSTANCE)INVALID_HANDLE_VALUE; std::map<HWND, CWndShadow *> CWndShadow::s_Shadowmap; CWndShadow::CWndShadow(void) : m_hWnd((HWND)INVALID_HANDLE_VALUE) , m_OriParentProc(NULL) , m_nDarkness(150) , m_nSharpness(5) , m_nSize(0) , m_nxOffset(5) , m_nyOffset(5) , m_Color(RGB(0, 0, 0)) , m_WndSize(0) , m_bUpdate(false) { } CWndShadow::~CWndShadow(void) { } bool CWndShadow::Initialize(HINSTANCE hInstance) { // Should not initiate more than once if (NULL != s_UpdateLayeredWindow) return false; HMODULE hUser32 = GetModuleHandle(_T("USER32.DLL")); s_UpdateLayeredWindow = (pfnUpdateLayeredWindow)GetProcAddress(hUser32, "UpdateLayeredWindow"); // If the import did not succeed, make sure your app can handle it! if (NULL == s_UpdateLayeredWindow) return false; // Store the instance handle s_hInstance = hInstance; // Register window class for shadow window WNDCLASSEX wcex; memset(&wcex, 0, sizeof(wcex)); wcex.cbSize = sizeof(WNDCLASSEX); wcex.style = CS_HREDRAW | CS_VREDRAW; wcex.lpfnWndProc = DefWindowProc; wcex.cbClsExtra = 0; wcex.cbWndExtra = 0; wcex.hInstance = hInstance; wcex.hIcon = NULL; wcex.hCursor = LoadCursor(NULL, IDC_ARROW); wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); wcex.lpszMenuName = NULL; wcex.lpszClassName = strWndClassName; wcex.hIconSm = NULL; RegisterClassEx(&wcex); return true; } void CWndShadow::Create(HWND hParentWnd) { // Do nothing if the system does not support layered windows if(NULL == s_UpdateLayeredWindow) return; // Already initialized _ASSERT(s_hInstance != INVALID_HANDLE_VALUE); // Add parent window - shadow pair to the map _ASSERT(s_Shadowmap.find(hParentWnd) == s_Shadowmap.end()); // Only one shadow for each window s_Shadowmap[hParentWnd] = this; // Create the shadow window m_hWnd = CreateWindowEx(WS_EX_LAYERED | WS_EX_TRANSPARENT, strWndClassName, NULL, /*WS_VISIBLE | */WS_CAPTION | WS_POPUPWINDOW, CW_USEDEFAULT, 0, 0, 0, hParentWnd, NULL, s_hInstance, NULL); // Determine the initial show state of shadow according to parent window's state LONG lParentStyle = GetWindowLong(hParentWnd, GWL_STYLE); if(!(WS_VISIBLE & lParentStyle)) // Parent invisible m_Status = SS_ENABLED; else if((WS_MAXIMIZE | WS_MINIMIZE) & lParentStyle) // Parent visible but does not need shadow m_Status = SS_ENABLED | SS_PARENTVISIBLE; else // Show the shadow { m_Status = SS_ENABLED | SS_VISABLE | SS_PARENTVISIBLE; ::ShowWindow(m_hWnd, SW_SHOWNA); Update(hParentWnd); } // Replace the original WndProc of parent window to steal messages m_OriParentProc = GetWindowLong(hParentWnd, GWL_WNDPROC); #pragma warning(disable: 4311) // temporrarily disable the type_cast warning in Win32 SetWindowLong(hParentWnd, GWL_WNDPROC, (LONG)ParentProc); #pragma warning(default: 4311) } LRESULT CALLBACK CWndShadow::ParentProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam) { _ASSERT(s_Shadowmap.find(hwnd) != s_Shadowmap.end()); // Shadow must have been attached CWndShadow *pThis = s_Shadowmap[hwnd]; switch(uMsg) { case WM_MOVE: if(pThis->m_Status & SS_VISABLE) { RECT WndRect; GetWindowRect(hwnd, &WndRect); SetWindowPos(pThis->m_hWnd, 0, WndRect.left + pThis->m_nxOffset - pThis->m_nSize, WndRect.top + pThis->m_nyOffset - pThis->m_nSize, 0, 0, SWP_NOSIZE | SWP_NOACTIVATE); } break; case WM_SIZE: if(pThis->m_Status & SS_ENABLED) { if(SIZE_MAXIMIZED == wParam || SIZE_MINIMIZED == wParam) { ::ShowWindow(pThis->m_hWnd, SW_HIDE); pThis->m_Status &= ~SS_VISABLE; } else if(pThis->m_Status & SS_PARENTVISIBLE) // Parent maybe resized even if invisible { // Awful! It seems that if the window size was not decreased // the window region would never be updated until WM_PAINT was sent. // So do not Update() until next WM_PAINT is received in this case if(LOWORD(lParam) > LOWORD(pThis->m_WndSize) || HIWORD(lParam) > HIWORD(pThis->m_WndSize)) pThis->m_bUpdate = true; else pThis->Update(hwnd); if(!(pThis->m_Status & SS_VISABLE)) { ::ShowWindow(pThis->m_hWnd, SW_SHOWNA); pThis->m_Status |= SS_VISABLE; } } pThis->m_WndSize = lParam; } break; case WM_PAINT: { if(pThis->m_bUpdate) { pThis->Update(hwnd); pThis->m_bUpdate = false; } //return hr; break; } // In some cases of sizing, the up-right corner of the parent window region would not be properly updated // Update() again when sizing is finished case WM_EXITSIZEMOVE: if(pThis->m_Status & SS_VISABLE) { pThis->Update(hwnd); } break; case WM_SHOWWINDOW: if(pThis->m_Status & SS_ENABLED) { if(!wParam) // the window is being hidden { ::ShowWindow(pThis->m_hWnd, SW_HIDE); pThis->m_Status &= ~(SS_VISABLE | SS_PARENTVISIBLE); } else if(!(pThis->m_Status & SS_PARENTVISIBLE)) { //pThis->Update(hwnd); pThis->m_bUpdate = true; ::ShowWindow(pThis->m_hWnd, SW_SHOWNA); pThis->m_Status |= SS_VISABLE | SS_PARENTVISIBLE; } } break; case WM_DESTROY: DestroyWindow(pThis->m_hWnd); // Destroy the shadow break; case WM_NCDESTROY: s_Shadowmap.erase(hwnd); // Remove this window and shadow from the map break; } #pragma warning(disable: 4312) // temporrarily disable the type_cast warning in Win32 // Call the default(original) window procedure for other messages or messages processed but not returned return ((WNDPROC)pThis->m_OriParentProc)(hwnd, uMsg, wParam, lParam); #pragma warning(default: 4312) } void CWndShadow::Update(HWND hParent) { //int ShadSize = 5; //int Multi = 100 / ShadSize; RECT WndRect; GetWindowRect(hParent, &WndRect); int nShadWndWid = WndRect.right - WndRect.left + m_nSize * 2; int nShadWndHei = WndRect.bottom - WndRect.top + m_nSize * 2; // Create the alpha blending bitmap BITMAPINFO bmi; // bitmap header ZeroMemory(&bmi, sizeof(BITMAPINFO)); bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER); bmi.bmiHeader.biWidth = nShadWndWid; bmi.bmiHeader.biHeight = nShadWndHei; bmi.bmiHeader.biPlanes = 1; bmi.bmiHeader.biBitCount = 32; // four 8-bit components bmi.bmiHeader.biCompression = BI_RGB; bmi.bmiHeader.biSizeImage = nShadWndWid * nShadWndHei * 4; BYTE *pvBits; // pointer to DIB section HBITMAP hbitmap = CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, (void **)&pvBits, NULL, 0); ZeroMemory(pvBits, bmi.bmiHeader.biSizeImage); MakeShadow((UINT32 *)pvBits, hParent, &WndRect); HDC hMemDC = CreateCompatibleDC(NULL); HBITMAP hOriBmp = (HBITMAP)SelectObject(hMemDC, hbitmap); POINT ptDst = {WndRect.left + m_nxOffset - m_nSize, WndRect.top + m_nyOffset - m_nSize}; POINT ptSrc = {0, 0}; SIZE WndSize = {nShadWndWid, nShadWndHei}; BLENDFUNCTION blendPixelFunction= { AC_SRC_OVER, 0, 255, AC_SRC_ALPHA }; MoveWindow(m_hWnd, ptDst.x, ptDst.y, nShadWndWid, nShadWndHei, FALSE); BOOL bRet= s_UpdateLayeredWindow(m_hWnd, NULL, &ptDst, &WndSize, hMemDC, &ptSrc, 0, &blendPixelFunction, ULW_ALPHA); _ASSERT(bRet); // something was wrong.... // Delete used resources SelectObject(hMemDC, hOriBmp); DeleteObject(hbitmap); DeleteDC(hMemDC); } void CWndShadow::MakeShadow(UINT32 *pShadBits, HWND hParent, RECT *rcParent) { // The shadow algorithm: // Get the region of parent window, // Apply morphologic erosion to shrink it into the size (ShadowWndSize - Sharpness) // Apply modified (with blur effect) morphologic dilation to make the blurred border // The algorithm is optimized by assuming parent window is just "one piece" and without "wholes" on it // Get the region of parent window, HRGN hParentRgn = CreateRectRgn(0, 0, 0, 0); GetWindowRgn(hParent, hParentRgn); // Determine the Start and end point of each horizontal scan line SIZE szParent = {rcParent->right - rcParent->left, rcParent->bottom - rcParent->top}; SIZE szShadow = {szParent.cx + 2 * m_nSize, szParent.cy + 2 * m_nSize}; // Extra 2 lines (set to be empty) in ptAnchors are used in dilation int nAnchors = max(szParent.cy, szShadow.cy); // # of anchor points pares int (*ptAnchors)[2] = new int[nAnchors + 2][2]; int (*ptAnchorsOri)[2] = new int[szParent.cy][2]; // anchor points, will not modify during erosion ptAnchors[0][0] = szParent.cx; ptAnchors[0][1] = 0; ptAnchors[nAnchors + 1][0] = szParent.cx; ptAnchors[nAnchors + 1][1] = 0; if(m_nSize > 0) { // Put the parent window anchors at the center for(int i = 0; i < m_nSize; i++) { ptAnchors[i + 1][0] = szParent.cx; ptAnchors[i + 1][1] = 0; ptAnchors[szShadow.cy - i][0] = szParent.cx; ptAnchors[szShadow.cy - i][1] = 0; } ptAnchors += m_nSize; } for(int i = 0; i < szParent.cy; i++) { // find start point int j; for(j = 0; j < szParent.cx; j++) { if(PtInRegion(hParentRgn, j, i)) { ptAnchors[i + 1][0] = j + m_nSize; ptAnchorsOri[i][0] = j; break; } } if(j >= szParent.cx) // Start point not found { ptAnchors[i + 1][0] = szParent.cx; ptAnchorsOri[i][1] = 0; ptAnchors[i + 1][0] = szParent.cx; ptAnchorsOri[i][1] = 0; } else { // find end point for(j = szParent.cx - 1; j >= ptAnchors[i + 1][0]; j--) { if(PtInRegion(hParentRgn, j, i)) { ptAnchors[i + 1][1] = j + 1 + m_nSize; ptAnchorsOri[i][1] = j + 1; break; } } } } if(m_nSize > 0) ptAnchors -= m_nSize; // Restore pos of ptAnchors for erosion int (*ptAnchorsTmp)[2] = new int[nAnchors + 2][2]; // Store the result of erosion // First and last line should be empty ptAnchorsTmp[0][0] = szParent.cx; ptAnchorsTmp[0][1] = 0; ptAnchorsTmp[nAnchors + 1][0] = szParent.cx; ptAnchorsTmp[nAnchors + 1][1] = 0; int nEroTimes = 0; // morphologic erosion for(int i = 0; i < m_nSharpness - m_nSize; i++) { nEroTimes++; //ptAnchorsTmp[1][0] = szParent.cx; //ptAnchorsTmp[1][1] = 0; //ptAnchorsTmp[szParent.cy + 1][0] = szParent.cx; //ptAnchorsTmp[szParent.cy + 1][1] = 0; for(int j = 1; j < nAnchors + 1; j++) { ptAnchorsTmp[j][0] = max(ptAnchors[j - 1][0], max(ptAnchors[j][0], ptAnchors[j + 1][0])) + 1; ptAnchorsTmp[j][1] = min(ptAnchors[j - 1][1], min(ptAnchors[j][1], ptAnchors[j + 1][1])) - 1; } // Exchange ptAnchors and ptAnchorsTmp; int (*ptAnchorsXange)[2] = ptAnchorsTmp; ptAnchorsTmp = ptAnchors; ptAnchors = ptAnchorsXange; } // morphologic dilation ptAnchors += (m_nSize < 0 ? -m_nSize : 0) + 1; // now coordinates in ptAnchors are same as in shadow window // Generate the kernel int nKernelSize = m_nSize > m_nSharpness ? m_nSize : m_nSharpness; int nCenterSize = m_nSize > m_nSharpness ? (m_nSize - m_nSharpness) : 0; UINT32 *pKernel = new UINT32[(2 * nKernelSize + 1) * (2 * nKernelSize + 1)]; UINT32 *pKernelIter = pKernel; for(int i = 0; i <= 2 * nKernelSize; i++) { for(int j = 0; j <= 2 * nKernelSize; j++) { double dLength = sqrt((i - nKernelSize) * (i - nKernelSize) + (j - nKernelSize) * (double)(j - nKernelSize)); if(dLength < nCenterSize) *pKernelIter = m_nDarkness << 24 | PreMultiply(m_Color, m_nDarkness); else if(dLength <= nKernelSize) { UINT32 nFactor = ((UINT32)((1 - (dLength - nCenterSize) / (m_nSharpness + 1)) * m_nDarkness)); *pKernelIter = nFactor << 24 | PreMultiply(m_Color, nFactor); } else *pKernelIter = 0; //TRACE("%d ", *pKernelIter >> 24); pKernelIter ++; } //TRACE("\n"); } // Generate blurred border for(int i = nKernelSize; i < szShadow.cy - nKernelSize; i++) { int j; if(ptAnchors[i][0] < ptAnchors[i][1]) { // Start of line for(j = ptAnchors[i][0]; j < min(max(ptAnchors[i - 1][0], ptAnchors[i + 1][0]) + 1, ptAnchors[i][1]); j++) { for(int k = 0; k <= 2 * nKernelSize; k++) { UINT32 *pPixel = pShadBits + (szShadow.cy - i - 1 + nKernelSize - k) * szShadow.cx + j - nKernelSize; UINT32 *pKernelPixel = pKernel + k * (2 * nKernelSize + 1); for(int l = 0; l <= 2 * nKernelSize; l++) { if(*pPixel < *pKernelPixel) *pPixel = *pKernelPixel; pPixel++; pKernelPixel++; } } } // for() start of line // End of line for(j = max(j, min(ptAnchors[i - 1][1], ptAnchors[i + 1][1]) - 1); j < ptAnchors[i][1]; j++) { for(int k = 0; k <= 2 * nKernelSize; k++) { UINT32 *pPixel = pShadBits + (szShadow.cy - i - 1 + nKernelSize - k) * szShadow.cx + j - nKernelSize; UINT32 *pKernelPixel = pKernel + k * (2 * nKernelSize + 1); for(int l = 0; l <= 2 * nKernelSize; l++) { if(*pPixel < *pKernelPixel) *pPixel = *pKernelPixel; pPixel++; pKernelPixel++; } } } // for() end of line } } // for() Generate blurred border // Erase unwanted parts and complement missing UINT32 clCenter = m_nDarkness << 24 | PreMultiply(m_Color, m_nDarkness); for(int i = min(nKernelSize, max(m_nSize - m_nyOffset, 0)); i < max(szShadow.cy - nKernelSize, min(szParent.cy + m_nSize - m_nyOffset, szParent.cy + 2 * m_nSize)); i++) { UINT32 *pLine = pShadBits + (szShadow.cy - i - 1) * szShadow.cx; if(i - m_nSize + m_nyOffset < 0 || i - m_nSize + m_nyOffset >= szParent.cy) // Line is not covered by parent window { for(int j = ptAnchors[i][0]; j < ptAnchors[i][1]; j++) { *(pLine + j) = clCenter; } } else { for(int j = ptAnchors[i][0]; j < min(ptAnchorsOri[i - m_nSize + m_nyOffset][0] + m_nSize - m_nxOffset, ptAnchors[i][1]); j++) *(pLine + j) = clCenter; for(int j = max(ptAnchorsOri[i - m_nSize + m_nyOffset][0] + m_nSize - m_nxOffset, 0); j < min(ptAnchorsOri[i - m_nSize + m_nyOffset][1] + m_nSize - m_nxOffset, szShadow.cx); j++) *(pLine + j) = 0; for(int j = max(ptAnchorsOri[i - m_nSize + m_nyOffset][1] + m_nSize - m_nxOffset, ptAnchors[i][0]); j < ptAnchors[i][1]; j++) *(pLine + j) = clCenter; } } // Delete used resources delete[] (ptAnchors - (m_nSize < 0 ? -m_nSize : 0) - 1); delete[] ptAnchorsTmp; delete[] ptAnchorsOri; delete[] pKernel; DeleteObject(hParentRgn); } bool CWndShadow::SetSize(int NewSize) { if(NewSize > 20 || NewSize < -20) return false; m_nSize = (signed char)NewSize; if(SS_VISABLE & m_Status) Update(GetParent(m_hWnd)); return true; } bool CWndShadow::SetSharpness(unsigned int NewSharpness) { if(NewSharpness > 20) return false; m_nSharpness = (unsigned char)NewSharpness; if(SS_VISABLE & m_Status) Update(GetParent(m_hWnd)); return true; } bool CWndShadow::SetDarkness(unsigned int NewDarkness) { if(NewDarkness > 255) return false; m_nDarkness = (unsigned char)NewDarkness; if(SS_VISABLE & m_Status) Update(GetParent(m_hWnd)); return true; } bool CWndShadow::SetPosition(int NewXOffset, int NewYOffset) { if(NewXOffset > 20 || NewXOffset < -20 || NewYOffset > 20 || NewYOffset < -20) return false; m_nxOffset = (signed char)NewXOffset; m_nyOffset = (signed char)NewYOffset; if(SS_VISABLE & m_Status) Update(GetParent(m_hWnd)); return true; } bool CWndShadow::SetColor(COLORREF NewColor) { m_Color = NewColor; if(SS_VISABLE & m_Status) Update(GetParent(m_hWnd)); return true; }
使用方法:
调用方法: 1. 程序入口函数WinMain处添加初始化 // Initiation of the shadow CWndShadow::Initialize(hInstance); 2. 窗体OnCreate中设置 LRESULT OnCreate(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled) { LONG styleValue = ::GetWindowLong(*this, GWL_STYLE); styleValue &= ~WS_CAPTION; ::SetWindowLong(*this, GWL_STYLE, styleValue | WS_CLIPSIBLINGS | WS_CLIPCHILDREN); m_WndShadow.Create(m_hWnd); m_WndShadow.SetSize(4); m_WndShadow.SetPosition(0, 0); // .... return 0; }
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