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Quick Info
Windows NT
| Yes
| Win95
| No
| Win32s
| No
| Import Library
| gdi32.lib
| Header File
| wingdi.h
| Unicode
| No
| Platform Notes
| None
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CancelDC
The CancelDC function cancels any pending operation on the specified device context (DC).
BOOL CancelDC(
HDC hdc
| // handle to device context
| );
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Parameters
hdc
Identifies the DC.
Return Values
If the function succeeds, the return value is nonzero.
If the function fails, the return value is zero.
Remarks
The CancelDC function is used by multithreaded applications to cancel lengthy drawing
operations. If thread A initiates a lengthy drawing operation, thread B may cancel
that operation by calling this function.
If an operation is canceled, the affected thread returns an error and the
result of its drawing operation is undefined. The results are also undefined if no
drawing operation was in progress when the function was called.
See Also
CreateThread, GetCurrentThread
Related Links
Software for Delphi and C++ Builder developers
Software for Visual Studio .NET developers
Software for Visual Basic 6 developers
Delphi Tips&Tricks
MegaDetailed.NET
More Online Helps
Win32 Multimedia Programmer's Reference (mmedia.hlp)
OLE Programmer's Reference (ole.hlp)
Microsoft Windows Pen API Programmer's Reference (penapi.hlp)
Microsoft Windows Sockets 2 Reference (sock2.hlp)
Microsoft Windows Telephony API (TAPI) Programmer's Reference (tapi.hlp)
Unix Manual Pages
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