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<P><SPAN style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt">I appreciate for
Harald Fernengel and Victor Roeder's reply. I have worked out
my problem finally. Indeed, "mydlg.exec()" works,(Thank you so much)
However, I'm doubt in a point. The popup dialog window
can only be active when the parent is the main interface(or
frame). If I want to click a button on the popup window, and again let it
pop out a small window. It doesn't work. <SPAN
style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt">As you said, I should
declare the parent, I'm sorry that I don't know exactly how to do it. The
sentense you wrote can not be simply added into the code. Could you indicate
it more clearly? </SPAN></SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt">I added the
following sentence into the "baseclase.cpp"</SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt">connect(
PushButton1, SIGNAL( clicked() ), this, SLOT( Slotshow() ) );</SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt">The
popup window is displayed, but seems that it response a bit slowly.
</SPAN><SPAN style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt"></SPAN></P>
<P><SPAN style="FONT-SIZE: 10pt; mso-bidi-font-size: 7.5pt">Best
regards,</SPAN></P></FONT></BLOCKQUOTE></BODY></HTML>