awvResizeWindow() is listed as deprecated. What I found is that the window you get with awvGetCurrentWindow() is the id of the window contained in a tab of your main VIVA-XL window but the one you need to resize is the main window. hiGetCurrentWindow() while the VIVA-XL window is the current one and hiResizeWindow() will change the size. Maybe you can get there with hiGetWindowList() but I have to admit I'm not good with searching through windows.
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