NAME WritePixel -- Change the pen num of one specific pixel in a specified rastport. SYNOPSIS error = WritePixel( rp, x, y) d0 a1 D0 D1 long writepixel( struct rastport *, short, short ); FUNCTION Changes the pen number of the selected pixel in the specified rastport to that currently specified by pena, the primary drawing pen. Obeys minterms in rastport. INPUTS rp - a pointer to the rastport structure (x,y) - point within the rastport at which the selected pixel is located. RESULT error = 0 if pixel succesfully changed = -1 if (x,y) is outside the rastport BUGS SEE ALSO readpixel() graphics/rastport.h