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MMProgRef - DDCMD Messages: Revision history

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9 June 2025

  • curprev 00:5400:54, 9 June 2025 Martini talk contribs 1,769 bytes +1,769 Created page with "{{MMProgRef}} The device driver commands are an interface used by a stream handler to communicate with a physical device driver. This interface uses the inter-device driver communication (IDC) mechanism provided by OS/2 AttachDD DevHelp. The stream handler must attach to the device driver using AttachDD DevHelp to receive the DDCMD entry point address of the device driver. This must be done prior to issuing any DDCMDs. Some device drivers also might require that a DosOpe..."
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