>As a wrap up to this thread if anyone uses it for reference down the road.
>
>This is probably a rookie mistake, but it's important to note that VFP's "ThisForm.Width" and "ThisForm.Height" reference only the inner portion of the form, not the titlebar and window borders. The WM_SIZING rectangle values for the form DO include these items. You can add SYSMETRIC(9) + (SYSMETRIC(4)*2) to your ThisForm.Height value to match and add (SYSMETRIC(4)*2) to match your ThisForm.Width value.
>
>If you're doing percentage calculations from a component inside the form to the form itself, these differences can really throw you off.

Now that you've dug it out, it makes a lot of sense. The sizes of the outer elements of a form may differ from system to system, depending on many things - size of the controlbox as the user decided in the display applet of the control panel, fontsize for form captions, and the widget library used by the windows manager (i.e. various skins, themes et al, including other window managers, like the bbLean that I'm using). Since the window innards are under VFP's control and the outer shell is done by the Windows level window manager, then it's (now) become obvious that each takes their own measurements into account.

Pixel counting was always easy, but never simple :).