Thank you wysota, for replying to this message. Actually If i use WindowStaysOnTopHint flag then i'm facing some probem like. I've opened a firefox and client send a message to me, its coming on top of the firefox, but acting as a modal box. Till i cannot give response to this dialog i cannot intract with other application.
NB: this dialog taking Mainwinodw as an argument.
Thank you.
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