GPiotr

Hello, The change that fixed the problem is changing the parameter of 'GetWindowLongA' and 'SetWindowLongA' from I64 to U32. Regarding the background shining through I did not encounter that issue on my machine.

Hello, At the beginning sorry for my mistake. I run the VI on LV2009 and it did not return error so I overlooked the wrong data type. Regarding the strange look of the window. I have the same configuration: Win XP SP3 and under LV2010 I get a proper look of the window. The corrected and, this time, commented code is in the attachment. Toolbar Window.vi

Hello, Try to use "Call Chain" function located in Programming->Application Control. It will return the array of VIs in a call stack.

Yes, I had to hide and show again the window in order for it to refresh. Sorry for lack of comments in the code.

Hello i think this might do a trick (see attachment). Is this what you are looking for? Toolbar.vi