WindowsAPI小程序

#include<windows.h>
#include<tchar.h>
LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM);

INT WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpszCmdParam,INT nCmdShow)
{
HWND hMainWnd;
MSG msg;
WNDCLASS myWC;
if(!hPrevInstance)
{
myWC.style=CS_VREDRAW|CS_HREDRAW;
myWC.lpfnWndProc=WndProc;
myWC.cbClsExtra=0;
myWC.cbWndExtra=0;
myWC.hInstance=hInstance;
myWC.hIcon=LoadIcon(NULL,IDI_APPLICATION);
myWC.hCursor=LoadCursor(NULL,IDC_ARROW);
myWC.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
myWC.lpszMenuName=NULL;
myWC.lpszClassName=_T("MyWindowClass");
RegisterClass(&myWC);
}
hMainWnd=CreateWindow(_T("MyWindowClass"),_T("MyWindowAPItitle"),WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
NULL,NULL,hInstance,NULL);
ShowWindow(hMainWnd,SW_SHOWMAXIMIZED);
UpdateWindow(hMainWnd);
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
LRESULT CALLBACK WndProc(HWND hMainwnd,UINT message,WPARAM wParam,LPARAM lParam)
{
char messageleft[]="the left button have been pushed";
char messageright[]="the right button have pushed";
switch(message)
{
case WM_RBUTTONDOWN:
{
MessageBox(GetFocus(),_T("messageright"),_T("RButtonPushDown"),MB_OK|MB_ICONINFORMATION);
break;
}
case WM_LBUTTONDOWN:
{
MessageBox(GetFocus(),_T("messageleft"),_T("LButtonPushDown"),MB_OK|MB_ICONINFORMATION);
break;
}
case WM_DESTROY:
{
PostQuitMessage(0);
return 0;
}
default:break;
}
return DefWindowProc(hMainwnd,message,wParam,lParam);
}