程序代码

/*
filename: HelloWin.c
des: show a MessageBox
*/

#include <windows.h>

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

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static char szAppName[] = "HelloWin";
HWND hwnd;
MSG msg;

MwRegisterButtonControl(NULL);
RegisterWndClass(WinProc, szAppName);

hwnd = CreateWindowEx(0L, szAppName, "Hello", WS_OVERLAPPEDWINDOW | WS_VISIBLE,
CW_USEDEFAULT, CW_USEDEFAULT, 240, 320,
NULL, NULL, NULL, NULL);

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

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

LRESULT CALLBACK WinProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
switch (iMsg) {

case WM_CREATE:
MessageBox(hwnd, "Hello World!");
break;

case WM_DESTROY:
PostQuitMessage(0);
break;

default:
return DefWindowProc(hwnd,iMsg,wParam,lParam);
}

return (0);
}