不同进程子类话窗口失败的例子

最新推荐文章于 2018-09-20 13:15:00 发布

原创最新推荐文章于 2018-09-20 13:15:00 发布 · 568 阅读

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#null #callback #manager #include

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本文介绍如何使用C++编程语言通过Windows API实现双击桌面触发特定操作的功能，涉及窗口查找、消息循环和宏对话框等关键技术。

#include <windows.h>

LONG backUp;

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
   switch(uMsg)
   {
   case WM_LBUTTONDBLCLK:
       MessageBox(hWnd, "双击桌面", "", MB_OK);
       break;
   default:
       return CallWindowProc((WNDPROC)backUp, hWnd, uMsg, wParam, lParam);
   }
   return 0;
}

int main(int argc, char *argv)
{
   HWND hWnd;

   hWnd = FindWindow("Progman", "Program Manager");
   if(NULL == hWnd)
   {
       MessageBox(NULL, "", "", 0);
       return -1;
   }
   HWND hSubWnd = FindWindowEx(hWnd, NULL, "SHELLDLL_DefView", "");
   if(NULL == hSubWnd)
   {
       MessageBox(NULL, "2", "", 0);
       return -2;
   }
   HWND hSubSubWnd = FindWindowEx(hSubWnd, NULL, "SysListView32", "FolderView");
   if(NULL == hSubSubWnd)
   {
       MessageBox(NULL, "3", "", 0);
       return -2;
   }
   //ShowWindow(hSubWnd, SW_SHOW);

   backUp = GetWindowLong(hSubSubWnd, GWL_WNDPROC);

   SetWindowLong(hSubSubWnd, GWL_WNDPROC, (LONG)WndProc);
   //EnableWindow(hSubWnd, TRUE);
   Sleep(60000);
   return 0;

}

桌面窗口和这个例子属于不同的进程空间, 想这样子类化窗口, 失败