[pywin32-bugs] [ pywin32-Bugs-838232 ] SetScrollInfo incorrectly raises exception

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Bugs item #838232, was opened at 2003-11-07 14:16
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Category: win32
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Greg Chapman (glchapman)
Assigned to: Nobody/Anonymous (nobody)
Summary: SetScrollInfo incorrectly raises exception

Initial Comment:
I'm using win32all build 163 on Windows XP.  I just got 
an api exception with 0 error code when using 
win32gui.SetScrollInfo.  It looks like the reason for this 
is that PySetScrollInfo treats the result of the 
SetScrollInfo api call as a BOOL, with a false result 
indicating error.  My copy of the win32 api 
documentation states that SetScrollInfo returns the 
current position of the scroll box.  This position 
happened to be 0 in my case, so PySetScrollInfo raised 
an exception.

Also, I just discovered that win32gui.GetScrollInfo also 
generates an api error with a 0 error code.  Looking at 
the source, I note that PyGetScrollInfo does not fill in 
the fMask field before calling GetScrollInfo.  My 
documentation indicates the mask must be initialized to 
specify which members to retrieve.

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