DOSMGR_Enable_Indos_Polling

include dosmgr.inc

VxDcall DOSMGR_Enable_Indos_Polling
 

Enables the InDOS polling for the Windows session. This allows TSR drivers that hook Interrupt 21h, and claim the critical section by setting the internal MS-DOS InDOS flag to continue to operate normally.

This service is intended for use by the virtual DOSNET device so that it can enable polling if the installed network requires it. The virtual device must not call this service during a Sys_Critical_Init message. Uses Flags.

• Clears the carry flag if InDOS polling is enabled; otherwise, sets the carry flag to indicate polling was already enabled.

Enabling InDOS polling has a severe impact on overall system performance.

This service overrides the InDOSPOLLING value specified in the SYSTEM.INI file. Since the virtual MS-DOS manager evaluates the SYSTEM.INI file during the Init_Complete message, a virtual device must call this service during the Device_Init message.