为什么调用CreateWindow函数的时候WinProc函数没有反应？

jtceleron 2011-10-05 11:30:34

我在WinProc函数写了WM_CREATE消息的处理语句，但是为什么调用CreateWindow函数的时候WinProc函数里对应的语句没有反应？

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Roy_Smiling 2011-10-05

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WinProc是回调函数，当有消息的时候OS 会调用的。你调用CreateWindow函数，跟WinProc有神码关系。

haican963 2011-10-05

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我也刚看windows程序设计。不知道是怎样没反应啊？应该有反应啊~

老邓 2011-10-05

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发错了，用这个吧。
先跑起来再说。

#include <Windows.h>

#include <tchar.h>



LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

{

    switch (uMsg)

    {

    case WM_CREATE:

        return 0;

    case WM_PAINT:

        break;

    case WM_DESTROY:

        PostQuitMessage(0);

        return 0;

    }



    return DefWindowProc(hWnd, uMsg, wParam, lParam);

}



int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE, PTSTR /*pszCmdLine*/, int /*nCmdShow*/)

{

    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style = CS_HREDRAW | CS_VREDRAW;

    wcex.lpfnWndProc = WndProc;

    wcex.cbClsExtra = 0;

    wcex.cbWndExtra = 0;

    wcex.hInstance = hInstance;

    wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);

    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);

    wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

    wcex.lpszMenuName = NULL;

    wcex.lpszClassName = _T("Windows Demo Class");

    wcex.hIconSm = wcex.hIcon;



    if (!RegisterClassEx(&wcex))

    {

        MessageBox(NULL, _T("RegisterClassEx failed!"), _T("Windows Demo"), MB_ICONERROR);

        return 0;

    }



    HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW,

                               _T("Windows Demo Class"),

                               _T("Windows Demo"),

                               WS_OVERLAPPEDWINDOW,

                               CW_USEDEFAULT,

                               CW_USEDEFAULT,

                               CW_USEDEFAULT,

                               CW_USEDEFAULT,

                               NULL,

                               NULL,

                               hInstance,

                               NULL);

    ShowWindow(hWnd, SW_SHOW);

    UpdateWindow(hWnd);



    MSG msg;

    while (GetMessage(&msg, NULL, 0, 0) > 0)

    {

        TranslateMessage(&msg);

        DispatchMessage(&msg);

    }



    return (int)msg.wParam;

}

老邓 2011-10-05

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#include <atlbase.h>

#include <atlwin.h>



CComModule _Module;



LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)

{

    static CAxWindow axWindow;



    switch (uMsg)

    {

    case WM_CREATE:

        RECT rc;

        GetClientRect(hWnd, &rc);

        axWindow.Create(hWnd, rc, 0, WS_CHILD | WS_VISIBLE);

        axWindow.CreateControl(OLESTR("shell.Explorer.2"));

        IWebBrowser2* webBrowser;

        axWindow.QueryControl(__uuidof(IWebBrowser2), (void**)&webBrowser);

        VARIANT varURL;

        VariantInit(&varURL);

        varURL.vt = VT_BSTR;

        varURL.bstrVal = SysAllocString(_T("http://2011.hebei.teacher.com.cn/"));

        webBrowser->Navigate2(&varURL, 0, 0, 0, 0);

        VariantClear(&varURL);

        webBrowser->Release();

        return 0;



    case WM_DESTROY:

        PostQuitMessage(0);

        return 0;

    }



    return DefWindowProc(hWnd, uMsg, wParam, lParam);

}



int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE, PTSTR /*pszCmdLine*/, int /*nCmdShow*/)

{

    WNDCLASSEX wcex;

    wcex.cbSize = sizeof(WNDCLASSEX);

    wcex.style = CS_HREDRAW | CS_VREDRAW;

    wcex.lpfnWndProc = WndProc;

    wcex.cbClsExtra = 0;

    wcex.cbWndExtra = 0;

    wcex.hInstance = hInstance;

    wcex.hIcon = LoadIcon(NULL, IDI_APPLICATION);

    wcex.hCursor = LoadCursor(NULL, IDC_ARROW);

    wcex.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);

    wcex.lpszMenuName = NULL;

    wcex.lpszClassName = _T("Windows Demo Class");

    wcex.hIconSm = wcex.hIcon;



    if (!RegisterClassEx(&wcex))

    {

        MessageBox(NULL, _T("RegisterClassEx failed!"), _T("Windows Demo"), MB_ICONERROR);

        return 0;

    }



    HWND hWnd = CreateWindowEx(WS_EX_APPWINDOW,

                               _T("Windows Demo Class"),

                               _T("Windows Demo"),

                               WS_OVERLAPPEDWINDOW,

                               CW_USEDEFAULT,

                               CW_USEDEFAULT,

                               CW_USEDEFAULT,

                               CW_USEDEFAULT,

                               NULL,

                               NULL,

                               hInstance,

                               NULL);

    ShowWindow(hWnd, SW_SHOW);

    UpdateWindow(hWnd);



    MSG msg;

    while (GetMessage(&msg, NULL, 0, 0) > 0)

    {

        TranslateMessage(&msg);

        DispatchMessage(&msg);

    }



    return (int)msg.wParam;

}