c++创建简单窗口

 

#include <stdio.h>
#include <Windows.h>

void __cdecl OutputDebugPrintf(const char* format, ...) {
    va_list vlArgs;
    char* strBuffer = (char*)GlobalAlloc(GPTR, 4096);
    va_start(vlArgs, format);
    //_vsnprintf(strBuffer, 4096 - 1, format, vlArgs);
    int size = strlen(strBuffer) - 1;
    _vsnprintf_s(strBuffer, size, 4096 - 1, format, vlArgs);
    va_end(vlArgs);
    //strcat(strBuffer, "\n");
    strcat_s(strBuffer, size, "\n");//这里字符串必须以 '\n' 结尾
    OutputDebugStringA(strBuffer);
    GlobalFree(strBuffer);
    return;
}

//自定义的窗口过程
LRESULT CALLBACK MyWindowProc(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam) {
    switch (Msg) {
    case WM_DESTROY:  
        OutputDebugPrintf("WM_DESTROY");
        PostQuitMessage(0);
        return 0;
    default:
        return DefWindowProc(hWnd, Msg, wParam, lParam);
    }
    return 0;
}


int WINAPI WinMain(
    _In_ HINSTANCE hInstance,       // 窗口句柄
    _In_opt_  HINSTANCE hPrevInstance, // 上一个窗口类的句柄
    _In_ LPSTR lpCmdLine,         // 命令行参数 
    _In_ int nShowCmd             // 窗口的显示状态
) {


    WNDCLASSW wnd = {
        CS_HREDRAW,
        MyWindowProc,
        0,0,
        hInstance,
        LoadIcon(NULL, IDI_APPLICATION),
        LoadCursor(NULL, IDC_ARROW),
        (HBRUSH)(GetStockObject(WHITE_BRUSH)),
        NULL,L"MyWindow"
    };

    RegisterClass(&wnd);

    HWND hWnd = CreateWindow(L"MyWindow", L"newWindow",
        WS_OVERLAPPEDWINDOW, 100, 100, 300, 300, NULL, NULL, hInstance, NULL);

    ShowWindow(hWnd, nShowCmd);

    UpdateWindow(hWnd);


    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg); //翻译消息
        DispatchMessage(&msg);  //分发消息到窗口过程
    }

    OutputDebugPrintf("exit");
    exit(0);


    return 0;
}

 创建出来：

 添加按钮：

    CreateWindow(TEXT("button"),//window预定义窗口类名
        TEXT("Button"),//名称
        WS_CHILD | WS_VISIBLE | WS_TABSTOP,//属性
        0, 0, 100, 30, //left、top、width、height (位置、大小)
        hwnd,//父窗口句柄
        (HMENU)1,//id
        hInstance,//程序句柄
        NULL);