纯winapi 实现最简单的按钮

 

#include <windows.h>

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

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
    PSTR szCmdLine, int iCmdShow)
{
    static TCHAR szAppName[] = TEXT ("BtnLook") ;
    HWND         hwnd ;
    MSG          msg ;
    WNDCLASS     wndclass ;

    wndclass.style         = CS_HREDRAW | CS_VREDRAW ;
    wndclass.lpfnWndProc   = WndProc ;
    wndclass.cbClsExtra    = 0 ;
    wndclass.cbWndExtra    = 0 ;
    wndclass.hInstance     = hInstance ;
    wndclass.hIcon         = LoadIcon (NULL, IDI_APPLICATION) ;
    wndclass.hCursor       = LoadCursor (NULL, IDC_ARROW) ;
    wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
    wndclass.lpszMenuName  = NULL ;
    wndclass.lpszClassName = szAppName ;

    if (!RegisterClass (&wndclass))
    {
        MessageBox (NULL, TEXT ("This program requires Windows NT!"),
            szAppName, MB_ICONERROR) ;
        return 0 ;
    }

    hwnd = CreateWindow (szAppName, TEXT ("Button Look"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT, CW_USEDEFAULT,//设置窗口起始坐标
        200, 200,//设置窗口宽、高
        NULL, NULL, hInstance, NULL) ;

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

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    HWND BS_hwnd;

    switch (message)
    {
    case WM_CREATE :
        
            BS_hwnd = CreateWindow ( TEXT("button"), //类别
            L"PUSHBUTTON",//按钮上的文本
            WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON,//样式
            10, 10,//相对的起始坐标
            150, 25,//宽，高
            hwnd, (HMENU) 1,//可以通过LOWORD (wParam)来获取，识别哪个按钮发送消息，当然还有其它方式
            ((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
        break;    

    case WM_DRAWITEM :
    case WM_COMMAND :
        MessageBox (hwnd, TEXT ("Hello"), TEXT ("HelloMsg"), 0);
        break ;

    case WM_DESTROY :
        PostQuitMessage (0) ;
        return 0 ;
    }
    return DefWindowProc (hwnd, message, wParam, lParam) ;
}