I've got a problem with the menu.
I created some code that drawes a line if I move the mouse over a picturebox, with the left button pressed. (the start coordinate is stored on mousedown, the second coordinate is the actual mouse position).
If I start this outside the picturebox (i.e. moving the mouse from outside the picturebox into the box with the buttom pressed) nothing is printed, that's OK. But if I start the same in the menu (off any menu item) the line is printed, starting at an old startposition( that's understandable, 'cause the last picture_mousedown is still valid), but why is the line printed now out all?