Modal Dialog getting Closed.

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Hi,
I have created one project of Modal and Modeless Dialog in MFC.

Modeless Dialog having property that it will get closed after 15 second, for closing Modelss dialog i am using DestroyWindow().

Now Problem is with Modal Dialog,
1)If we open Modeless Dialog(which will automatically gets close after 15 second).

2)Before closing Modeless Dialog if we open Modal Dialog then after 15 second both Modal & Modeless Dialogs are getting closed and Application geting crashed.

3)I think DestroyWindow() is closing both Dialog.

Please Help me....How to solve this problem.

Posted 23-Oct-12 19:43pm

Swapnil Bhalerao

Updated 25-Feb-17 8:31am

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Sergey Alexandrovich Kryukov 15-Feb-13 15:46pm

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Santhosh G_ · Answer 1 · 2012-10-23T20:44:00

Solution 1

If you calling DestroyWindow from a thread other than GUI thread, it will create access violation.
Please ensure DestroyWindow is called from GUI thread.
One option is to Post WM_CLOSE Message to your dialog(Using PostMessage),
and close all other dialogs from ModelLessDlg::OnClose().

Posted 23-Oct-12 20:44pm

Santhosh G_

Updated 23-Oct-12 20:46pm

v3