PageControl and its tabsheets events

[asdf]

1. What are the differences of tabsheet events; OnShow, OnEnter or OnMouseEnter  ?

2. From the attached picture, PageControl is showing TabSheet3.
   What event is working with TabSheet4 while it is now 'behind' TabSheet3  ?

3. What is the proper event when user clicks on tab namely TabSheet4  ?

[theo]

I don't really understand the questions, but I think you are looking for

TPageControl.OnChange. See this example:

Code: Pascal  [Select][+][-]

1. procedure TForm1.PageControl1Change(Sender: TObject);
2. begin
3.   Caption:=PageControl1.ActivePage.Caption;
4. end;

[ringo]

OnShow will be fired whenever the tab page is "shown", that is, displayed.  It doesn't matter if it was shown due to a mouse click or programically.

OnEnter will be fired when you navigate into the page, whether it is via a mouse click or the tab key or any other means.

OnMouseEnter will be fired when to enter the tab page specifically by clicking the mouse.

I think Theo probably identified the event you are really looking for.

Ringo

[asdf]

OnShow will be fired whenever the tab page is "shown", that is, displayed.  It doesn't matter if it was shown due to a mouse click or programically.

Thank you, in design window, I sometimes forgot and saved the project with PageControl.TabIndex <> 0.
And for example, in some PageControls, TabIndex(TabSheet)2 has to wait until TabSheet1Show finishes. That's why compiling has error. Now I always put PageControl1.TabIndex:=0 .