When Windows Scroll event is triggered

  • Thread starter Thread starter Amir Ali
  • Start date Start date
A

Amir Ali

Dear All,
How can I come to know that Form's scroll' position is changed
(eigther by code or user interaction).

Amir Ali.
 
Hi,

Override the forms wndproc. You will recieve the wm_hscroll and
wm_vscroll messages.

Private Const WM_VSCROLL As Integer = &H115
Private Const WM_HSCROLL As Integer = &H114
Protected Overrides Sub WndProc(ByRef m As Message)
' Listen for operating system messages

If m.Msg = WM_VSCROLL Then
' Vertical scroll
ElseIf m.Msg = WM_HSCROLL Then
' Horizontal scroll
End If

MyBase.WndProc(m)
End Sub

Ken
---------------
Amir Ali said:
Dear All,
How can I come to know that Form's scroll' position is changed
(eigther by code or user interaction).

Amir Ali.
Click to expand...
 
Thanks Ken, the code you provided works.

Now, will you guide me how I can handle form's scroll.

Means, sometimes ( not always) I want to stop scrolling.

Is it possible.

A lot of thanks.

Amir Ali.
 
Hi,

Just suppress the wm_hscroll or wm_vscroll message by not calling
mybase.wndproc(m) when you want to stop scrolling.

Ken
--------------
Amir Ali said:
Thanks Ken, the code you provided works.

Now, will you guide me how I can handle form's scroll.

Means, sometimes ( not always) I want to stop scrolling.

Is it possible.

A lot of thanks.

Amir Ali.
Click to expand...
 
Dear Ken,
Thanks again for your continuous response. I am just one step
away from my solution. Please guide me to that destination.

Now, I just want to know message number (like &h15) of

(1) when scroll position is changed automatically (without user
interaction with scroll).
OR

(2) Message number of event when some controls location is changed.

With a lot of thanks. and waiting for response,
Amir Ali.
 
Back
Top