[SOLVED] Is there any event for shapes?

Is there any event for shapes?

I have an ellipse which is drew on a window. I want to show a message when the pointer is on it (on the ellipse). How I do it? Is there any event for shapes? Like WM_MOVE or WM_SIZE.

I use TDM-GCC and C language.

Solution

There are no events for mouse activity over drawings. You are expected to remember where you draw, and then map the mouse coordinates to the drawing coordinates yourself. To help with this, have a look at the PtInRegion() function. Create an elliptical HRGN via CreateEllipticRgn() or CreateEllipticRgnIndirect() that matches your drawing (in fact, you can use the same HRGN to help facilitate the drawing, see the FillRgn() function), and when you want to test if the mouse is currently inside the drawing, such as in a WM_MOUSEMOVE handler, you can use PtInRegion() for that.