add cbutton to dockablepane

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MFC

I create a default SDI application and want to modify the CCLassView which is derived from CDockablePane.

I have added a button to the client area but it does not display properly and is not clickable.

I thought that the treeview was rendering over the button, so I changed the treeview to a tree control and resized it to not fill the entire client area. Then I added the button and messagemap for it.

the button is drawn as if it is semi transparent? and no mouse action is available for it. Liek something is being drawn over it?

anyone know what I am doing wrong?

btw, the tree control works just fine and I can resize as desired. it's just that the button is not correct.