Check if mouse buttons are swapped or not in C++

Question

I want to send some mouse click messages to a specified window of another program. I currently use WM_LBUTTONUP and WM_LBUTTONDOWN messages whose works fine.

These messages performs exactly same way regardless of a user's mouse button settings. Oppose from it, I want to know if user has swapped mouse buttons from mouse settings control panel.

I researched and found SwapMouseButton function, it works fine but I don't want to swap mouse buttons actually and I just want to know whether it is previously swapped or not.

From MSDN:

If the meaning of the mouse buttons was reversed previously, before the function was called, the return value is nonzero.

I can get the information I want this way, but it also restores them to original state of mouse buttons. I only want to check and not to restore to original state.

I currently call this function like:

SwapMouseButton(FALSE);

I like to know any other alternative way (something like SystemParametersInfo) to only check (not to also restore) whether mouse buttons has previously swapped by user.

Basically, what I want to do is simulate a primary mouse button click and a secondary mouse button click according to user's mouse button meanings.

For example, when I simulate a primary mouse button click, and if user has swapped the mouse buttons, right mouse click should simulate, otherwise left, as usual. There are no messages exist called WM_PRIMARY... and WM_SECONDARY... for me to do what I want.

Thanks in advance.

Answer 1

You can use GetSystemMetrics with SM_SWAPBUTTON parameter value.

SM_SWAPBUTTON 23

Nonzero if the meanings of the left and right mouse buttons are swapped; otherwise, 0.