Zooming In on a Selection: Step 2
Modify the EZFUNC.H file to add global variables for tracking coordinates. The variable declarations should appear as follows:
L_BOOL FirstDraw; /* The state for the first WM_MOUSEMOVE event when cropping */
int StartGDIX; /* Starting X position in screen pixels */
int StartGDIY; /* Starting Y position in screen pixels */
int EndGDIX; /* Ending X position in screen pixels */
int EndGDIY; /* Ending Y position in screen pixels */
int StartPixelX; /* Starting X position in bitmap pixels */
int StartPixelY; /* Starting Y position in bitmap pixels */
int EndPixelX; /* Ending X position in bitmap pixels */
int EndPixelY; /* Ending Y position in bitmap pixels */
L_INT DisplayLeft, DisplayTop; /* Origin of the displayed image */