VC,SDK小程序

 1 #include<windows.h>
 2 #include<iostream>
 3 LRESULT CALLBACK WndProc(        
 4 HWND hwnd,
 5 UINT,
 6 WPARAM wParam,
 7 LPARAM lParam
 8 );//回调函数声明
 9 int WINAPI WinMain(
 HINSTANCE hInstance,
 HINSTANCE hPrevInstance,
 LPSTR lpCmdLine,
 int nShowCmd )
 {
        WNDCLASS wndclass;
        wndclass.cbClsExtra=0;
        wndclass.cbWndExtra=0;
        wndclass.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
        wndclass.hCursor=LoadCursor(NULL,IDC_CROSS);//采用系统的，用NULL
        wndclass.hIcon=LoadIcon(NULL,IDI_ERROR);
        wndclass.hInstance=hInstance;
        wndclass.lpfnWndProc=WndProc;
        wndclass.lpszClassName="welson";
        wndclass.lpszMenuName=NULL;
        wndclass.style=CS_VREDRAW|CS_HREDRAW;
       
        RegisterClass(&wndclass);
        HWND hwnd;
        hwnd=CreateWindow("welson","First API",WS_OVERLAPPEDWINDOW,
               CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,//位置
               NULL,//父窗口
               NULL,//菜单
               hInstance,
               NULL);//附加信息lpParam
        ShowWindow(hwnd,SW_SHOWDEFAULT);//shownormal,showdefault,SW_MINIMIZE
        UpdateWindow(hwnd);
        MSG msg;
        while(GetMessageA(&msg,NULL,0,0))
        {
               TranslateMessage(&msg);
               DispatchMessage(&msg);
        }
        return 0;
 }
 LRESULT CALLBACK WndProc(        
 HWND hwnd,
 UINT uMsg,
 WPARAM wParam,
 LPARAM lParam
 )
 {
         switch(uMsg){
         case WM_CHAR:
               char  szchar[20];
               sprintf(szchar,"the char is %d",wParam);
               MessageBox(hwnd,szchar,"my_first_api",0);
               break;
        case WM_LBUTTONDOWN:
               HDC hdc;
               hdc=GetDC(hwnd);
               TextOut(hdc,0,50,"this is mouse",strlen("this is mouse"));
               ReleaseDC(hwnd,hdc);
               break;
        case WM_CLOSE:
               if(IDYES==MessageBox(hwnd,"是否关闭?","messgebox",MB_YESNO))
                      DestroyWindow(hwnd);
               break;
        case WM_DESTROY:
               PostQuitMessage(0);
               break;
        case WM_PAINT:
               HDC hDc;
               PAINTSTRUCT ps;
               hDc=BeginPaint(hwnd,&ps);
               TextOut(hDc,0,60,"this is be painting",strlen("this is be painting"));
               EndPaint(hwnd,&ps);
               break;
        default:
               return DefWindowProc(hwnd,uMsg,wParam,lParam);
        }
        return 0;
 }