CODEWITHSUNDEEP
windowswinapiuser-interface
Jichao
Jichao

Reputation: 41845

When to call UpdateLayeredWindow?

I used UpdateLayeredWindow to draw a window which use png as background. But this window contain some self-draw buttons which would change when user hover/click these buttons and then the window should change.

Now the problem is when should I call UpdateLayeredWindow. Shoud I call UpdateLayeredWindow after the user changed the button apperance, that is when user hover the mouse above the buttons or clicked the buttons?

Upvotes: 1

Views: 413

Answers (1)

Jichao
Jichao

Reputation: 41845

When need to update the layeredwindow, call UpdateLayeredWindow, but be really careful with this.

Call it too frequently do cause performance problem, its not WM_PAINT which could combine to one if there is too much in the message queue. UpdateLayeredWindow do not...

Upvotes: 1

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