On Jan 11, 2008 9:14 PM, Henry Baxter <[EMAIL PROTECTED]> wrote: > Hello, > > I have been happily using ctypes for a while to do win32 programming. I use > the Microsoft documentation to understand the function, then call it with the > help of ctypes. > > The problem is that the docs says user32.dll has GetWindowLongPtr, but ctypes > can't find it using windll.user32.GetWindowLongPtrA or > windll.user32.GetWindowLongPtrW or windll.user32.GetWindowLongPtr. Errors > look like this: > > Traceback (most recent call last): > File "Z:\experiments\windowsapp3.py", line 106, in <module> > GetWindowLongPtr = windll.user32.GetWindowLongPtrA > File "C:\Python25\lib\ctypes\__init__.py", line 353, in __getattr__ > func = self.__getitem__(name) > File "C:\Python25\lib\ctypes\__init__.py", line 358, in __getitem__ > func = self._FuncPtr((name_or_ordinal, self)) > AttributeError: function 'GetWindowLongPtrA' not found > > I have the same problem with the SetWindowLongPtr function. > > I can use plenty of other functions (GetParent, CreateWindowExA, > DefWindowProcA, and etc) but not these ones. > > > I don't understand what goes on with ctypes under the hood really, so my > troubleshooting abilities at this point are quite lacking! I would appreciate > any help you could offer. > > > Thanks!
I don't have a copy of the official Win32 headers handy, but the MinGW version of winuser.h contains this section of code: WINUSERAPI LONG WINAPI GetWindowLongA(HWND,int); WINUSERAPI LONG WINAPI GetWindowLongW(HWND,int); #ifdef _WIN64 WINUSERAPI LONG_PTR WINAPI GetWindowLongPtrA(HWND,int); WINUSERAPI LONG_PTR WINAPI GetWindowLongPtrW(HWND,int); #else #define GetWindowLongPtrA GetWindowLongA #define GetWindowLongPtrW GetWindowLongW #endif which I would take to mean you need to use GetWindowLong on 32-bit windows, and GetWindowLongPtr on 64-bit windows. -- David -- http://mail.python.org/mailman/listinfo/python-list
