Knowledge Base

Using Thunks with Windows 95, Windows 98, or Windows Me Printer Driver

Article ID: 133090

Article Last Modified on 2/12/2007

Microsoft Windows 95 Driver Development Kit (DDK)
Microsoft Windows 98 Driver Development Kit (DDK)
Microsoft Windows Millennium Edition Driver Development Kit

This article was previously published under Q133090

SUMMARY

A Windows 95, Windows 98, Windows Millennium Edition (Me) printer driver should only use thunks in calls to the ABORTDOC, ENDDOC, NEWFRAME, NEXTBAND and STARTDOC subfunctions of its Control() function.

MORE INFORMATION

If a Windows 95, Windows 98, or Windows Me printer driver thunks in any call other than a ABORTDOC, ENDDOC, NEWFRAME, NEXTBAND or STARTDOC call, the Windows graphics device interface (GDI) may become reentrant. Because the GDI was never designed to be reentrant, the system may be left in an unstable state or errors may occur. If the printer driver thunks or yields, this causes the Win16Mutex system semaphore to be released and another thread may enter the GDI.

Additional query words: 4.00 win95

Keywords: kbinfo KB133090