我找到了一个成功的方法来让它工作而不进入循环。 信息循环似乎不断在循环中读取, 如果您不使用正确的结构过滤, 它会掉入无限的循环中。 这对我有效。 如果您有更好的输入, 请使用所有手段来做添加 。

正确的步骤。

1. Create WM_NOTIFY Message filter event.
2. Create Switch statement using NMHDR to parse the code for NM_CLICK.
3. Check wParam to identify correct control being clicked.
4. Execute link with ShellExecute.
   

使用了以下代码。

       case WM_NOTIFY:
           //NMHDR* pHeader = (NMHDR*)lParam;
           //NMLINK* pNMLink = (NMLINK*)lParam;
           //LITEM iItem = pNMLink->item;
           switch(((NMHDR *)lParam)->code)
           {
               case NM_CLICK:
               { // Included to avoid "case" skip statements.
                   times++;

                   NMLINK* pNMLink = (NMLINK*)lParam;
                   LITEM iItem = pNMLink->item;
                   // Custom OutputDebugString
                   winapi::Output("NM_CLICK: Fired %d time%s!
", times, (times <= 1) ? L"" : L"s");
#ifdef DEBUG
                   assert(iItem.szID);
                   MessageBox(NULL, (LPCWSTR)lParam, L"Assert", MB_OK|MB_ICONINFORMATION);
#endif
                   if(wParam == IDC_LINK1)
                   {
                       winapi::Output("Success!");
                       OpenLink(hWndDlg, LOWORD(wParam));
                   }

note :如果依赖包含 HTML 属性( link 或这里) 的链接喂养 Shellexecuceut URL 路径, 请使用 NMLINK 结构 。

Just to clarify, I do not think you are using managed C++, there for I am not sure why you are referring to a NM_CLICK notificaton code as an event. Besides, you do not have to catch anything, you are not handling any exceptions, you are just handling a WM_NOTIFY message.

Anyway, I am not sure why you experience this particular behavior since I do not see what you do outside of the code snippet but I know what is causing it. In our code snippet you use wParam to determine a notification code and this is incorrect. This control does not use wParam. To determine notification code you should do the following:

    NMHDR* pHeader = (NMHDR*)lParam;

    switch (pHeader->code)

< 加固 > p Header- & gt; code 持有您应该使用的通知代码值, 而 < 坚固 > pheader- gt; hwndFrom 是被单击的控件的控件控件 。

Furthermore, you using LOWORD(wParam) again and pass it as the parameter to function call. You are not showing what you do in this function but I can conclude that the code is also not correct. The same lParam is a pointer to the NMLINK structure. First member of this structure is mentioned above NMHDR, the next member is LITEM structure that should be used to determine what the URL is.

    NMLINK* pNMLink = (NMLINK*)lParam;
    LITEM iItem = pNMLink->item;

item.szUrl 是您在呼叫 ShellExercute 调用时应该使用的 URL 。

两者中

1. 您的 OpenLink 函数导致另一个消息( 最有可能) 发送, 或

2. 这不是唯一一个调用 OpenLink 的代码,

3. 您不是来自 WM_NOTIFY ,而是来自上述案件的倒转,或者

4. 您虽然已经处理过,但还是为信件拨打 DefWindowProc 。

尝试

  break; // make sure there s no fall-through here
  case NM_CLICK:
     switch(LOWORD(wParam))
     {
         case IDC_LINK1:
             // Standard ShellExecute with added check for IsLinkCtrl to make sure its the right kind of control.
             OpenLink(hWndDlg, LOWORD(wParam));            
             return TRUE; // handled, don t pass to DefWindowProc
     }
     break;