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Portable Network Graphic  |  1990-09-25  |  14.0 KB  |  552x727  |  1-bit (2 colors)
   ocr: FUNCTION LockPixels (pm: Piuthplandle)boolean; Call this tunction prior to any drawing operation to or from the ottscreen environment. Al false value retuned means the ottscreen pixMap has been purged. A LockPixels result of false tells the application to either recreate the ottscreen pixMap, using Updatecworld in the process, or draw directly to the target window. PROCEDURE UnlockPixels (pm: PixMaphandle); When you finish drawing, you: should call UnlockPixels. Just remember that all that is Swteu should be ppduke. Otherwise, strange things may happen. ONE MORE CALL YOULL NEED FUNCTION Update ...