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cover dialog with a translucent bitmap and disable dialog

I have several dialogs in my app and under some circumstances, the user must be prevented from using any of the controls of certain dialogs.  What I want is to cover the dialog with a translucent gray color so it looks evenly disabled, and I want to disable all the controls on the dialog.  If I disable the dialog, then the user cannot close or move the dialog.  My controls are in a panel which I can disable,but different controls have different looks when they are disabled, and some do not look any different than when they are enabled.  So I had the idea to cover the controls with some translucent color so they all look grayed out in the same way.

I know how to draw a bitmap with the correct alpha, but can I draw this over all the controls in a dialog?

Can anyone suggest a good way to do this?  
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bryanwells
Asked:
bryanwells
1 Solution
 
man068Commented:
add a image to the form so that it covers the whole panel. initially make it invisible/disabled. then enable it whenever you want other controls to be not visible. this is just an idea.

thanks
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