Scroll two windows together WIN32

[arun_pk]

My application is having one Main window. Which has two child windows. I am showing the child windows side by side.Once if we scroll any of the child windows scrollbar. Both should scroll together. Please let me know if you have any idea. Thanks in advance

[_Superman_]

Whenever a scroll operation happens in a child window, the window will receive a WM_HSCROLL or WM_VSCROLL message depending on what scroll operation is done. To make the other child window also do the similar scroll operation you could propogate the same scroll message to the other child window from the WM_HSCROLL or WM_VSCROLL handler using PostMessage.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

[Aescleal]

The trouble with forwarding messages to another window is what happens (as in the questioners case) if that window has the same behaviour? Each window will send WM_*SCROLL back and forth until someone gets bored. Cheers, Ash

[Aescleal]

If I were you I'd stick the scroll bars on the frame window. When someone clicks the scroll bar you can scroll the child windows, either by forwarding them the scroll bar messages or using a custom message. Cheers, Ash

[_Superman_]

The lParam for these messages are there to handle this situation.

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

[Aescleal]

Good point, I forgot about the NULL lParam, Cheers, Ash

[sourabhmehta]

Thanks.. It was really helpfull