How can I catch tab change on a TabControl?

[David Rose]

I would like to catch the tab change before it occurs. There is a
SelectedIndexChanged event to catch the change after it occurs. How do I
catch when the user clicks on a tab, but before the TabPage changes?

Is there anything like the TCN_SELCHANGING notification?

TIA

David Rose

 

[David Rose]

Nicholas,

Thanks. That works fine.

I was hoping that there would be an easier way, but I guess that for some
reason that event is not handled in .NET.

David

David,

You should be able to hook into the windows procedure of the parent of
the tab control and catch that notification. You just have to override the
WndProc method on that container.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

I would like to catch the tab change before it occurs. There is a
SelectedIndexChanged event to catch the change after it occurs. How do I
catch when the user clicks on a tab, but before the TabPage changes?

Is there anything like the TCN_SELCHANGING notification?

TIA

David Rose

 

[Mike Shane]

You could use the MouseDown event to determine that the user has clicked on
the tab contol and then check to see what tab was clicked.

Mike Shane
MST Associates

Nicholas,

Thanks. That works fine.

I was hoping that there would be an easier way, but I guess that for some
reason that event is not handled in .NET.

David


in message news:[email protected]...

David,

You should be able to hook into the windows procedure of the parent of
the tab control and catch that notification. You just have to override the
WndProc method on that container.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

I would like to catch the tab change before it occurs. There is a
SelectedIndexChanged event to catch the change after it occurs. How

do

I

 

[David Rose]

Mike,

That was the first thing I tried. For some reason that event fires after
the SelectedIndexChanged event for the TabControl. I am not sure how
Windows Forms routes events. Know a good source of information on Forms
event routing?

Handling the WM_NOTIFY message works as expected.

David

You could use the MouseDown event to determine that the user has clicked on
the tab contol and then check to see what tab was clicked.

Mike Shane
MST Associates

Nicholas,

Thanks. That works fine.

I was hoping that there would be an easier way, but I guess that for some
reason that event is not handled in .NET.

David


in message news:[email protected]...

parent

of

the tab control and catch that notification. You just have to

override
the

WndProc method on that container.

Hope this helps.


--
- Nicholas Paldino [.NET/C# MVP]
- (e-mail address removed)

I would like to catch the tab change before it occurs. There is a
SelectedIndexChanged event to catch the change after it occurs. How

do

I
catch when the user clicks on a tab, but before the TabPage changes?

Is there anything like the TCN_SELCHANGING notification?

TIA

David Rose