## Presentation Device Driver Reference for OS/2

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### PrtOpen - Remarks

If an attempt is made to open a device file that has already been opened by the spooler, this call will block on a semaphore. This call also calls the port driver to initialize the port. PrtOpen is an emulation of DosOpen. For a full description of the parameters, refer to the function "DosOpen" in the Presentation Manager Programming Reference.