SetWindowLongPtr vs SetWindowLong (x64 vs x86)

[Lennart P.]

Hello,

Previously I have been using SetWindowLongPtr to change the owner of the window, and it works fine. However, I recently had to move everything to 32bit since I had to use 32bit DLLs. After switching to 32bit JVM the SetWindowLongPtr fails with error: "java.lang.UnsatisfiedLinkError: Error looking up function 'SetWindowLongPtr': The specified procedure could not be found.", which is kind of understandable. From MSDN: "When compiling for 32-bit Windows, SetWindowLongPtr is defined as a call to the SetWindowLong function." So I should just use SetWindowLong function instead.

Now to the actual problem... If I could previously do 

SetWindowLongPtr(childHwnd, WinUser.GWL_HWNDPARENT, parentHwnd.getPointer());

Then what would the equivalent line be for SetWindowLong function?

SetWindowLong(childHwnd, WinUser.GWL_HWNDPARENT, ???)

The 3rd parameter has to be Integer?! It should be so simple, yet I am clueless.

Kind regards,

Lennart

[Timothy Wall]

You can use `Pointer.nativeValue()` and cast it to the appropriate size (or define an additional method mapping which takes a Pointer as an argument), e.g.

    // DO NOT use this mapping on 64-bit!

    SetWindowLong(HWND hWnd, int nIndex, Pointer dwPointerValue);

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[Lennart P.]

Super. Thanks very much!