// FUNCTIONS //////////////////////////////////////////////
LRESULT CALLBACK WindowProc(HWND hwnd,
UINT msg,
WPARAM wparam,
LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT ps; // used in WM_PAINT
HDC hdc; // handle to a device context
// what is the message
switch(msg)
{
case WM_CREATE:
{
// do initialization stuff here
STARTUPINFO si = { sizeof(si) };
PROCESS_INFORMATION pi;
TCHAR szCommandLine[] = TEXT("Calculator");
if(!CreateProcess(TEXT("c:\\windows\\system32\\calc.exe"),szCommandLine,NULL,NULL,FALSE,0,NULL,NULL,&si,&pi))
{ MessageBox (NULL, TEXT ("Error !"), TEXT ("Error"), 0);}
Sleep(5000);// 等待5秒，这主要是为了方便看到 计算器程序 窗口的标题 计算器 被改为 A Test Caption
SendMessage(FindWindow(NULL,"计算器"),WM_SETTEXT,0,(LPARAM)"A Test Caption");
// return success
return(0);
} break;
case WM_PAINT:
{
// simply validate the window
hdc = BeginPaint(hwnd,&ps);
// you would do all your painting here
EndPaint(hwnd,&ps);
// return success
return(0);
} break;
case WM_DESTROY:
{
// kill the application, this sends a WM_QUIT message
PostQuitMessage(0);
// return success
return(0);
} break;
default:break;
} // end switch
// process any messages that we didn't take care of
return (DefWindowProc(hwnd, msg, wparam, lparam));
} // end WinProc
// WINMAIN ////////////////////////////////////////////////
int WINAPI WinMain( HINSTANCE hinstance,
HINSTANCE hprevinstance,
LPSTR lpcmdline,
int ncmdshow)
{
WNDCLASSEX winclass; // this will hold the class we create
HWND hwnd; // generic window handle
MSG msg; // generic message
