【转】C++ Win32开发Groupbox子窗口含有的Button不响应单击等消息事件解决

旧城等待， 2022-10-22 04:10 3阅读 0赞

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   <td style="vertical-align:top;"> <h1><a href="https://bytes.com/topic/c/answers/891582-radio-button-groupbox-not-generating-wm_command" rel="nofollow">Radio button in groupbox is not generating WM_COMMAND</a></h1> 
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       <td style="vertical-align:top;"><a rel="nofollow"></a><a rel="nofollow"></a><a href="https://bytes.com/profile/246194/johny10151981/" rel="nofollow">johny10151981</a> <p>&nbsp;1,059&nbsp;1GB</p> Hi,<br> Here a code part that create a group box and radio button <p>Expand|Select|Wrap|Line Numbers</p> 
        <ol> 
         <li>hGroup=CreateWindowEx(0,L"BUTTON",L"Choose&nbsp;Connection&nbsp;type",&nbsp;WS_CHILD|WS_VISIBLE|BS_GROUPBOX|WS_GROUP,30,180,300,85,hWnd,(HMENU)10006,hInstance,&nbsp;NULL);</li> 
         <li>CreateWindowEx(0,L"BUTTON",L"Direct&nbsp;Connection",WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON,&nbsp;10,17,280,30,hGroup,(HMENU)&nbsp;10010,hInstance&nbsp;,NULL);</li> 
         <li>CreateWindowEx(0,L"BUTTON",L"XML&nbsp;Connection",WS_CHILD|WS_VISIBLE|BS_RADIOBUTTON,&nbsp;10,47,280,30,hGroup,(HMENU)&nbsp;10011,hInstance,NULL);</li> 
         <li>&nbsp;</li> 
        </ol> here is the part in WM_COMMAND.. <p>&nbsp;</p> 
        <ol> 
         <li>case&nbsp;WM_COMMAND:</li> 
         <li>wmId&nbsp;&nbsp;&nbsp;&nbsp;=&nbsp;LOWORD(wParam);</li> 
         <li>wmEvent&nbsp;=&nbsp;HIWORD(wParam);</li> 
         <li>//&nbsp;Parse&nbsp;the&nbsp;menu&nbsp;selections:</li> 
         <li>switch&nbsp;(wmId)</li> 
         <li>&nbsp;&nbsp;{ </li> 
         <li>&nbsp;&nbsp;&nbsp;case&nbsp;10010:</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;setRadiocehck(hGroup,GetDlgItem(hGroup,10010));</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;break;</li> 
         <li>&nbsp;&nbsp;&nbsp;case&nbsp;10011:</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;setRadiocehck(hGroup,GetDlgItem(hGroup,10011));</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;break;&nbsp;&nbsp;</li> 
         <li>&nbsp;&nbsp;&nbsp;}</li> 
         <li>&nbsp;</li> 
        </ol> and this WM_COMMAND is related with&nbsp;<strong>hGroup</strong>&nbsp;window's Mother window i.e. main window in my program.<br><br> The problem is on click action 10010 or 10011 never get called.<br> I have realized one possible reason. The reason is the WndProc is related with main window it only process its child window but not grand child (:)) Radiobuttons are not main windows child. in that case what would be the best solution to toggle between radio buttons.<br><br> Please let me know.<br> Best regards,<br> Johny <p>&nbsp;</p> <p>&nbsp;</p> <p>&nbsp;</p> <a rel="nofollow"></a><a href="https://bytes.com/profile/259288/thejaguar/" rel="nofollow">thejaguar</a> <p>&nbsp;</p> <h3>It most certainly can be done, here is sample code:</h3> <p>&nbsp;</p> 
        <ol> 
         <li>//&nbsp;Global</li> 
         <li>WNDPROC&nbsp;GroupBoxProc;</li> 
         <li>&nbsp;</li> 
         <li>LONG&nbsp;CALLBACK&nbsp;GroupRelay(HWND&nbsp;hwnd,&nbsp;UINT&nbsp;msg,&nbsp;WPARAM&nbsp;wParam,&nbsp;LPARAM&nbsp;lParam){ </li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;if(msg&nbsp;==&nbsp;WM_COMMAND&nbsp;||&nbsp;msg&nbsp;==&nbsp;WM_NOTIFY){ </li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;SendMessage(GetParent(hwnd),&nbsp;msg,&nbsp;wParam,&nbsp;lParam);</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;}</li> 
         <li>&nbsp;</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;return&nbsp;CallWindowProc(GroupBoxProc,&nbsp;hwnd,&nbsp;msg,&nbsp;wParam,&nbsp;lParam);</li> 
         <li>}</li> 
         <li>&nbsp;</li> 
         <li>//&nbsp;&nbsp;&nbsp;&nbsp;WM_CREATE</li> 
         <li>&nbsp;</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;grpMailbox&nbsp;=&nbsp;CreateWindowEx(</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WS_EX_CONTROLPARENT,</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"BUTTON",</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;"Mailbox&nbsp;settings",</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;WS_CHILD&nbsp;|&nbsp;WS_VISIBLE&nbsp;|&nbsp;BS_GROUPBOX&nbsp;|&nbsp;WS_CLIPCHILDREN,</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;12,&nbsp;12,</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;371,&nbsp;131,</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;hwnd,</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(HMENU)(GRPMAILBOX),</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;hInst,</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NULL);</li> 
         <li>&nbsp;</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;GroupBoxProc&nbsp;=&nbsp;reinterpret_cast&lt;WNDPROC&gt;(GetWindowLongPtr(grpMailbox,&nbsp;GWLP_WNDPROC));</li> 
         <li>&nbsp;&nbsp;&nbsp;&nbsp;SetWindowLongPtr(grpMailbox,&nbsp;GWLP_WNDPROC,&nbsp;reinterpret_cast&lt;LONG_PTR&gt;(GroupRelay));</li> 
         <li>&nbsp;</li> 
        </ol> This will relay all WM_COMMAND and WM_NOTIFY messages to the parent and pass the rest to the box as normal.<br><br> This code is directly from my working code, so it is verified working (Under XP SP3, but it should work in all others)<br><br> Note: Just in case you're not familiar, this is C++, in C replace&nbsp;<em>reinterpret_cast&lt;X&gt;</em>&nbsp;with&nbsp;<em>(X)</em></td> 
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