Question

我正在尝试在C＃中子类化外部窗口。我之前在VB6中使用过类似的东西没有任何问题，但下面的代码不起作用。有人可以帮帮我吗？

//API

[DllImport("user32")]
private static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, IntPtr newProc);

[DllImport("user32")]
private static extern IntPtr SetWindowLong(IntPtr hWnd, int nIndex, WinProc newProc);

[DllImport("user32.dll")]
private static extern IntPtr DefWindowProc(IntPtr hWnd, int uMsg, int wParam, int lParam);

[DllImport("user32")]
private static extern IntPtr CallWindowProc(IntPtr lpPrevWndFunc, IntPtr hWnd, int Msg, int wParam, int lParam);

private delegate IntPtr WinProc(IntPtr hWnd, int Msg, int wParam, int lParam);

private const int GWL_WNDPROC = -4;

private enum winMessage : int
{
    WM_GETMINMAXINFO = 0x024,
    WM_ENTERSIZEMOVE = 0x231,
    WM_EXITSIZEMOVE = 0x232
}

private WinProc newWndProc = null;
private IntPtr oldWndProc = IntPtr.Zero;
private IntPtr winHook = IntPtr.Zero;

//Implementation

public void hookWindow(IntPtr winHandle)
{
    if (winHandle != IntPtr.Zero)
    {
        winHook = winHandle;

        newWndProc = new WinProc(newWindowProc);
        oldWndProc = SetWindowLong(winHook, GWL_WNDPROC,newWndProc);
    }
}

public void unHookWindow()
{
    if (winHook != IntPtr.Zero)
    {
        SetWindowLong(winHook, GWL_WNDPROC, oldWndProc);
        winHook = IntPtr.Zero;
    }
}

private IntPtr newWindowProc(IntPtr hWnd, int Msg, int wParam, int lParam)
{
     switch (Msg)
     {
         case (int)winMessage.WM_GETMINMAXINFO:
             MessageBox.Show("Moving");
             return DefWindowProc(hWnd, Msg, wParam, lParam);

}

Answer 1

确定即时完成编码，但在您的解决方案中，您必须拥有表单解决方案和dll解决方案并且它可以工作，如果您希望该代码让我知道。但是你不能在同一个exe中进行子类化。所以它可以在c＃中完成，但是当我开始转换我的c ++项目时，你确实需要那个dll

所有因为

BOOL WINAPI DllMain(HANDLE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
{
    switch(fdwReason)
    {
        case DLL_PROCESS_ATTACH:
            {
                hInstance=(HINSTANCE)hinstDLL;
            }
            break;
        case DLL_PROCESS_DETACH:
            {
                if((int)hndll>1)
                {
                    SetWindowLong(hndll,GWL_WNDPROC,OldWndHndl);   //Set back the old window procedure
                    return 1;
                }       
            }
    }
}

Answer 2

使用C＃是不可能的。只有非托管C / C ++才能做到这一点..

如果winHook来自另一个进程，

oldWndProc = SetWindowLong(winHook, GWL_WNDPROC,newWndProc);将始终返回0（表示失败）。

参考：https://social.msdn.microsoft.com/Forums/vstudio/en-US/8dd657b5-647b-443b-822d-ebe03ca4033c/change-wndproc-of-another-process-in-c

在C＃.NET中对外部窗口进行子类化

2 个答案: