windows贴图代码

#include"windows.h"
#include "resource.h"

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
					PSTR szCmdLine, int iCmdShow)
{
	static TCHAR szAppName [] = TEXT ("Bricks1") ;
	HWND         hwnd ;
	MSG          msg ;
	WNDCLASS     wndclass ;

	wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
	wndclass.lpfnWndProc   = WndProc ;
	wndclass.cbClsExtra    = 0 ;
	wndclass.cbWndExtra    = 0 ;
	wndclass.hInstance     = hInstance ;
	wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
	wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
	wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
	wndclass.lpszMenuName  = NULL ;
	wndclass.lpszClassName = szAppName ;

	if (!RegisterClass (&wndclass))
	{
		MessageBox (NULL, TEXT ("This program requires Windows NT!"),
			szAppName, MB_ICONERROR) ;
		return 0 ;
	}

	hwnd = CreateWindow (szAppName, TEXT ("LoadBitmap Demo"), 
		WS_OVERLAPPEDWINDOW, 
		CW_USEDEFAULT, CW_USEDEFAULT,
		CW_USEDEFAULT, CW_USEDEFAULT,
		NULL, NULL, hInstance, NULL) ;

	ShowWindow (hwnd, iCmdShow) ;
	UpdateWindow (hwnd) ;

	while (GetMessage (&msg, NULL, 0, 0))
	{
		TranslateMessage (&msg) ;
		DispatchMessage (&msg) ;
	}
	return msg.wParam ;
}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	static HBITMAP hBitmap ;
	static int     cxClient, cyClient, cxSource, cySource ;
	BITMAP         bitmap ;
	HDC            hdc, hdcMem ;
	HINSTANCE      hInstance ;
	int            x, y ;
	PAINTSTRUCT    ps ;
	LPCREATESTRUCT lpstruct;
	switch (message)
	{
	case WM_CREATE:
		lpstruct=(LPCREATESTRUCT) lParam;
		hInstance = ((LPCREATESTRUCT) lParam)->hInstance ;

		//hBitmap = LoadBitmap (NULL,TEXT(".\\Bricks.bmp")) ;
		hBitmap = LoadBitmap (hInstance, MAKEINTRESOURCE (IDB_BITMAP2)/*TEXT("Bricks")*/) ;
		//hBitmap=LoadImage(NULL,)
		//hBitmap=LoadImage(NULL,TEXT(".\\Bricks.bmp"),IMAGE_BITMAP,NULL,NULL,LR_DEFAULTCOLOR);
		//hBitmap=LoadImage(hInstance,MAKEINTRESOURCE(IDB_BITMAP2),IMAGE_BITMAP,NULL,NULL,LR_DEFAULTCOLOR);
		GetObject (hBitmap, sizeof (BITMAP), &bitmap) ;

		cxSource = bitmap.bmWidth ;
		cySource = bitmap.bmHeight ;

		return 0 ;

	case WM_SIZE:
		cxClient = LOWORD (lParam) ;
		cyClient = HIWORD (lParam) ;
		return 0 ;

	case WM_PAINT:
		hdc = BeginPaint (hwnd, &ps) ;

		//hdcMem = CreateCompatibleDC (hdc) ;
		//SelectObject (hdcMem, hBitmap) ;

		//x=0,y=0;
		//for (y = 100 ; y < cyClient-50 ; y += cySource)
		//{
		//	for (x = 100 ; x < cxClient-50; x += cxSource)
		//	{
		//		BitBlt (hdc, x, y, cxSource, cySource, hdcMem, 0, 0, SRCCOPY) ;
		//		//	Sleep(10);
		//	}
		//}

		//DeleteDC (hdcMem) ;
		EndPaint (hwnd, &ps) ;
		return 0 ;

	case WM_LBUTTONDOWN:
		InvalidateRect(hwnd, NULL, FALSE/*TRUE*/);
		x=LOWORD(lParam);
		y=HIWORD(lParam);

		hdc =GetDC(hwnd);

		hdcMem = CreateCompatibleDC (hdc) ;
		SelectObject (hdcMem, hBitmap) ;
		BitBlt (hdc, x, y, cxSource, cySource/2, hdcMem, 0, 0, SRCCOPY) ;
		DeleteDC (hdcMem) ;
		ReleaseDC(hwnd,hdc);
		return 0 ;

	case WM_RBUTTONDOWN:

		InvalidateRect(hwnd, NULL, FALSE/*TRUE*/);//缺了效果不好
		x=LOWORD(lParam);
		y=HIWORD(lParam);

		hdc = BeginPaint (hwnd, &ps) ;

		hdcMem = CreateCompatibleDC (hdc) ;
		SelectObject (hdcMem, hBitmap) ;
		BitBlt (hdc, x, y, cxSource, cySource/2, hdcMem, 0, 0, SRCCOPY) ;
		DeleteDC (hdcMem) ;
		EndPaint (hwnd, &ps) ;

		return 0;
	case WM_DESTROY:
		DeleteObject (hBitmap) ;
		PostQuitMessage (0) ;
		return 0 ;
	}
	return DefWindowProc (hwnd, message, wParam, lParam) ;
}