ShowWindow enter an infinite loop when you try to open a subfolder of a file system shell extension

Hi all,

I've implemented a file system shell extension. Everything works fine, but the next case: the user tries to open a subfolder of the extended file system (double clicking on its icon, for example), but an error is detected. When the ShowWindow is called to display the error message, the thread enters an infinite loop within the ShowWindow function.

It seems that the shell access mode when double click to open a subfolder which prohibits the display of new windows.

Have someone faced this situation? Can anyone give me a suggestion in order to investigate in the right direction?

I thank very you much.

Hello

I discovered the reason for the behavior represented: I created the message window as a child of the display window. At the opening of the subfolder view window becomes disabled, which also affect the child window. Definition of the parent to NULL window I solved the problem.

Paolo Righi

Tags: Windows

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