## Presentation Device Driver Reference for OS/2

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### Support

GreEscape is called by DevEscape. GreEscape with the escape code, DEVESC_ QUERYESCSUPPORT, must be supported by all presentation drivers. Hardcopy drivers also support the DEVESC_STARTDOC, DEVESC_ABORTDOC, DEVESC_NEXTFRAME , and DEVESC_ENDDOC escape codes. The other escape codes are optional. See Defined Escape Codes and the individual escape codes that follow.