SO>I have a dialog window with an entry field in it. I do not want
 SO>the user to be able to change the content of that field directly.
 SO>What I want is a second dialog box that opens when the entry field
 SO>receives the focus, since the entry field only shows a part of the
 SO>actual data it stands for. However, when I intercept the WM_SETFOCUS
 SO>command to open that second dialog window, I get a problem. As the
 SO>PM reference says, I may not change the focus while processing
 SO>WM_SETFOCUS. But this is exactly what happens when I open a dialog
 SO>window. So, how can I do it? I need a method to open a dialog window
 SO>while processing WM_SETFOCUS, make it the currently focussed window
 SO>and return the focus to the window that received WM_SETFOCUS in the
 SO>first place _without_ having it receive that message again (because
 SO>this would result in an endless loop).

Post a message to yourself to start the dialog box, set a flag somewhere
in the window words indicating that you did so, and don't loop if you've
already done it (tweak depending on the exact behavior desired).  I
assume you subclassed the entry field for more than the WM_SETFOCUS
message (else you would use WM_CONTROL/EN_SETFOCUS).

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