How to get the size of a Winforms Form titlebar height?

Question

So if it\'s toolwindow or a minimizable form, I want to be able to get its height programmatically.

Is this possible? If so how?

Answer 1

There is an additional wrinkle in case your form is a view in an MDI application. In that case RectangleToScreen(this.ClientRectangle) returns coordinates relative not to Form itself (as one might expect) but with respect to MainForm which hosts MDIClient control hosting the Form.

You may to account for that by

Point pnt = new Point(0, 0);
Point corner = this.PointToScreen(pnt); // upper left in MainFrame coordinates
Point origin = this.Parent.PointToScreen(pnt); // MDIClient upperleft in MainFrame coordinates
int titleBarHeight = corner.Y - origin.Y - this.Location.Y;