Enabling buttons in dialog box

[DoctorC]

If I have several radio buttons, can I enable or disable a command button depending on which radio button is clicked?&nbsp;&nbsp;For example, if 3 radio buttons in a group are labeled WHITE, BLACK, and GRAY, can I enable a command button on the same dialog only if WHITE or BLACK are checked, but not GRAY?&nbsp;&nbsp;I thought of using an <font color=red>ON_UPDATE_COMMAND_UI</font> macro, with the handler function containing an &quot;<font color=red>if</font>&quot; statement checking the variables mapped to the radio controls, but I think <font color=red>DoDataExchange</font> doesn't get called yet to set the values.&nbsp;&nbsp;Any other ideas how I can dynamically handle the state of a button (or edit box, etc) according to selections made by the user?

 

[psnead]

I would make a private boolean variable that I could toggle depending on which button the user pressed.&nbsp;&nbsp;And then enable or disenable the buttons depending on the state of the boolean.

 

[DoctorC]

Thanks for your quick reply.&nbsp;&nbsp;I'm afraid I'm still not getting it...how does that private boolean variable get set in a modal dialog if nothing else has been clicked.&nbsp;&nbsp;I am hoping to enable/disable a button before &quot;OK&quot; or &quot;Cancel&quot; are clicked.&nbsp;&nbsp;The answer might be right in front of my eyes, but I am just not seeing it.

 

[palbano]

Dear DoctorC,<br><br>If I understand your stated problem correctly, try this:<br><br>Open Class Wizard and select the 'Member Variables' tab. You should see a single entry for all the radio buttons with the Control ID of the first in the group. Create a member variable for that control, say you name it ( _nRadio). <br><br>Now create a 'Control' type variable for each of the 'Buttons' you want to enable/disable say there are two and you name the variables '_btnOne' and '_btnTwo'.<br><br>Now click the 'Message Map' tab on the Wizard dialog. Create a handler for each radio button Control's BN_CLICKED messsage. Now click 'OK'.<br><br>Now create a member function for your dialog say you call it 'onRadio' so the function body looks like this:<br><br>void MyDialog:nRadio(){<br>}<br><br>Now in each of the 'BN_CLICK' handlers for the radio controls add a call to 'onRadio()'.<br><br>Now add this code to the 'onRadio' function of course changing it in such a way that it generates your desired behavior.<br><br>UpdateData();<br>switch( _nRadio){<br>case 0:<br> _btnOne.EnableWindow( FALSE);<br> _btnTwo.EnableWindow( TRUE);<br> break;<br>case 1:<br> _btnOne.EnableWindow( TRUE);<br> _btnTwo.EnableWindow( FALSE);<br> break;<br>case 2:<br> _btnOne.EnableWindow( TRUE);<br> _btnTwo.EnableWindow( TRUE);<br> break;<br>}<br><br><br>Hope this helps<br>-pete<br>

 

[DoctorC]

Thanks Pete<br><br>I haven't tried it yet, but your suggestion sounds right on.&nbsp;&nbsp;If you don't see another response here from me, you can assume it worked.&nbsp;&nbsp;Thanks again<br><br>Dr.C