jweinraub
18th May 2009 19:06 UTC

Modal MessageBox
Guys,

Is there an option to make a MessageBox modal? MB_TOPMOST doesn't seem to do the trick. I have a question box that I want to be centre/top and unable to do anything until answered.

Is this possible with NSIS?

Thanks

Afrow UK
18th May 2009 19:16 UTC

I'm not sure what your problem is. The MessageBox instruction produces a modal message box which until a selection is made, halts code execution. Where are you showing one?

Stu

jweinraub
18th May 2009 20:04 UTC

I want one similar to a modal box like mfc produces so it takes focus. Not just installation halt but doesn't allow anything else to be done too until question answered. Like if you click outside of the box, the computer will ding.

Anders
18th May 2009 20:31 UTC

why do you want to hurt your users?

jweinraub
18th May 2009 21:01 UTC

I don't, it was more if it was possible :-)

jpderuiter
18th May 2009 22:23 UTC

To make a Messagebox modal you have to pass the parent window handle instead of NULL.

You can do this by

!include "${NSISDIR}\Examples\System\System.nsh"
!define STYLE ${MB_OK}|${MB_ICONINFORMATION}
System::Call 'User32::MessageBox(i $HWNDPARENT, t "The text", t "A caption", i ${STYLE}) i.'

jpderuiter
18th May 2009 22:25 UTC

Hmm, and this is exactly what the NSIS MessageBox is doing, so what is your question?

Afrow UK
18th May 2009 22:49 UTC

jweinraub I very much doubt this is possible with Windows as is. Have you ever seen this done before in an installation wizard?

Stu

Animaether
19th May 2009 12:59 UTC

I've seen it done before in some applications that throw an error (and I don't mean the UAC prompt).. so it can be done, but it sure is annoying(!)

jweinraub
19th May 2009 14:30 UTC

I don't recall if I ever seen an installation program do it, but I have seen Windows programs do it.

jweinraub
19th May 2009 16:24 UTC

Techically that example is modal to the parent window, not the desktop. I believe a true modal dialogue won't let you do anything else until that has been answered...

But I don't plan on doing anything that will make our customers annoyed it was just a curiosity question.

jpderuiter
19th May 2009 16:47 UTC

Originally posted by jweinraub
Techically that example is modal to the parent window, not the desktop.

Originally posted by jweinraub
I believe a true modal dialogue won't let you do anything else until that has been answered...