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Hiding forms whilst repainting

Posted on 2005-04-11
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Last Modified: 2012-05-05
I have an application which uses three forms, but implements a tab control to give the illusion of being a single-form application.  There is a problem when I switch from one form to another using code like this:

'''We are in the form frmFirst
frmFirst.Hide
frmSecond.Show

The controls from frmSecond slowly appear over frmFirst and it looks ugly.  I have two related questions:

1 How do I switch off screen updates whilst the controls are being drawn

2 The first time the a form is activated it takes several seconds longer.  I want to show a title form first when the application starts, and at the same time load the forms into memory but without them showing.  Is there a way to do this?

My hunch is that this is easy, but darned if I can find it in the VB help pages.

J.
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Question by:jfell
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Accepted Solution

by:
Erick37 earned 200 total points
ID: 13755643
1) Check the LockWindowUpdate API function to prevent your window from redrawing.
http://www.mentalis.org/apilist/LockWindowUpdate.shtml

2)  Use:
Load Form1
to load a form into memory - but not show it.
Use Form1.Show when you are ready to show the form.
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Author Comment

by:jfell
ID: 13756229
2) Works! :-)

1) It looks promising, but I need to start something else right now, so I've accepted the answer in faith.

Cheers!

J

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