Sampling mousedown in a menu hookproc() ?

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C++

Long story short:

I needed to spy on an application so as to detect File,Save click.
I have had help both here and over at codeguru and now at the end of the week, I can do what I
set out to do. using an application hook (not a global one).

The problem I am having is sampling WM_MENUSELECT causes a "true" condition just by cruising
the mouse over the sub-menu (ie &Save). obviously this is unacceptable as I need to know when the user has actually clicked save. So I went about checking the flags - this did not help.

And so I did this very ugly piece of test code to see if I could "sample" the mouse key state.
giving my fingers enough time while incremting a dwell variable from 0 to 0xffff while checking GetAsyncKeyState(l_Button....

It never sees the mouse click.

Then it dawned on me, I am holding up this applcations message queue while I am waiting for
a mouse click. - that won't happen.

If that is the case, I am at a loss right now as how to detect a mouse click on &Save (Save menu item) instead of firing when I cruise over it with the mouse.

Here is the ugly buggered up section where I sample the mouse button.

int dwell=0;
if(!strncmp(szmenu,"&Save",5)) // mouse is over Save menu item
{
	while(dwell < 0xffff) // long enough for me to click mouse - proof of concept....
        {
		if ((GetAsyncKeyState(VK_LBUTTON) & 0x80) != 0)
	        {
			dwell = 0xffff; // terminate while
			WritePersistFile = 1; // do what we do when user clicks Save
		}
		dwell++;
	}
}