Windows 窗口编程

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

// 消息处理过程, 其地址填入 WNDCLASS 结构的 lpfnWndProc 后, 由系统自动调用
LRESULT CALLBACK WindowProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
	switch(uMsg)
	{
		
	case WM_CHAR:
		char szChar[20];
		sprintf(szChar,"Char code is %d", wParam);
		MessageBox(hwnd, szChar, "char", 0);
		break;
	case WM_LBUTTONDOWN:
		MessageBox(hwnd, "mouse clicked","message", 0);
		
		HDC hdc;
		hdc = GetDC(hwnd);
		TextOut(hdc, 0, 50, "天成数码", strlen("天成数码"));
		ReleaseDC(hwnd, hdc);
		break;
	case WM_PAINT:
		HDC hDC;
		PAINTSTRUCT ps;
		hDC=BeginPaint(hwnd, &ps);
		TextOut(hDC,0,0,"http://www.baidu.com/",strlen("http://www.baidu.com/"));
		EndPaint(hwnd, &ps);
		break;
		
	case WM_CLOSE:
		if( IDYES==MessageBox(hwnd,"退出吗?","message",MB_YESNO))
		{
			DestroyWindow(hwnd);
		}
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	case WM_COMMAND:
		if( wParam==ID_MENUITEM40001 )
		{
			PostMessage(hwnd,WM_CLOSE,0,0);
			break;
		}
	default:
		return DefWindowProc(hwnd,uMsg,wParam,lParam);
	}
	return 0;
}

WNDCLASS aaa;

int WINAPI WinMain(
   HINSTANCE hInstance,
   HINSTANCE hPrevInstance,
   LPSTR lpCmdLine,
   int nCmdShow )
{
	// 填充窗口类初始值
	aaa.style = CS_HREDRAW | CS_VREDRAW ;//| CS_NOCLOSE;
	aaa.lpfnWndProc = WindowProc;
	aaa.cbClsExtra=0;
	aaa.cbWndExtra=0;
	aaa.hInstance = hInstance; 
	aaa.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON1) );
	aaa.hCursor = LoadCursor(hInstance, MAKEINTRESOURCE(IDC_CURSOR1) );
	aaa.hbrBackground = (HBRUSH) GetStockObject( WHITE_BRUSH );
	aaa.lpszClassName="tc2007"; // 关键部位
	aaa.lpszMenuName=0;

	// 注册窗口类
	RegisterClass(&aaa);

	// 建立窗口
	HWND h = CreateWindow( "tc2007","first program",WS_OVERLAPPEDWINDOW,0,0,500,300,NULL,LoadMenu( hInstance, MAKEINTRESOURCE(IDR_MENU1)),hInstance,NULL);

	// 显示和刷新窗口
	ShowWindow(h, nCmdShow );
	UpdateWindow(h);

	// 进入消息循环, 退出则程序也退出
	MSG msg;
	while( GetMessage(&msg, NULL, 0, 0) )
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	
	return msg.wParam;
}