按钮

#include<windows.h>
#include <stdio.h>  
#include <stdarg.h>  
#include <ctype.h> 

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

void __cdecl OutputDebugStringF(const char* format, ...)
{
    va_list vlArgs;
    char* strBuffer = (char*)GlobalAlloc(GPTR, 4096);

    va_start(vlArgs, format);
    _vsnprintf(strBuffer, 4096 - 1, format, vlArgs);
    va_end(vlArgs);
    strcat(strBuffer, "
");
    OutputDebugStringA(strBuffer);
    GlobalFree(strBuffer);
    return;
}
void CreateButton(HWND hwnd)
{
    HWND hwndPushButton;
    HWND hwndCheckBox;
    HWND hwndRadio;

    hwndPushButton = CreateWindow(
        TEXT("button"),
        TEXT("普通按钮"),
        //WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_DEFPUSHBUTTON,                        
        WS_CHILD | WS_VISIBLE | BS_PUSHBUTTON | BS_DEFPUSHBUTTON,
        10, 10,
        80, 20,
        hwnd,
        (HMENU)1001,        //子窗口ID                
        hAppInstance,
        NULL);

    TCHAR szBuffer[0x20];
    GetClassName(hwndPushButton, szBuffer, 0x20);

    WNDCLASS wc;
    GetClassInfo(hAppInstance, szBuffer, &wc);
    OutputDebugStringF("-->%s
", wc.lpszClassName);
    OutputDebugStringF("-->%x
", wc.lpfnWndProc);

    hwndCheckBox = CreateWindow(
        TEXT("button"),
        TEXT("复选框"),
        //WS_CHILD | WS_VISIBLE | BS_CHECKBOX | BS_AUTOCHECKBOX,                        
        WS_CHILD | WS_VISIBLE | BS_CHECKBOX | BS_AUTOCHECKBOX,
        10, 40,
        80, 20,
        hwnd,
        (HMENU)1002,        //子窗口ID                
        hAppInstance,
        NULL);

    hwndRadio = CreateWindow(
        TEXT("button"),
        TEXT("单选按钮"),
        //WS_CHILD | WS_VISIBLE | BS_RADIOBUTTON | BS_AUTORADIOBUTTON,                        
        WS_CHILD | WS_VISIBLE | BS_RADIOBUTTON ,
        10, 70,
        80, 20,
        hwnd,
        (HMENU)1003,        //子窗口ID                
        hAppInstance,
        NULL);
}

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

    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("My Window App!"),
        WS_OVERLAPPEDWINDOW,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        CW_USEDEFAULT,
        NULL,
        NULL,
        hInstance,
        NULL
    );

    CreateButton(hwnd);
    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)
{
    
    switch (message)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;

    case WM_COMMAND:
    {
        switch (LOWORD(wParam))
        {
        case 1001:
            MessageBox(hwnd, TEXT("Hello Button 1"), TEXT("Demo"), MB_OK);
            return 0;
        case 1002:
            MessageBox(hwnd, TEXT("Hello Button 2"), TEXT("Demo"), MB_OK);
            return 0;
        case 1003:
            MessageBox(hwnd, TEXT("Hello Button 3"), TEXT("Demo"), MB_OK);
            return 0;
        }
        return DefWindowProc(hwnd, message, wParam, lParam);
    }

    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}

按钮是系统已经预定义的，所以可以直接创建。并且