Microsoft KB Archive/176322

= The Far East GetTextExtent API Fails with Null LPNFit =

Article ID: 176322

Article Last Modified on 11/1/2006

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APPLIES TO


 * Microsoft Windows NT Server 4.0, Terminal Server Edition
 * Microsoft Windows NT Workstation 3.51
 * Microsoft Windows NT Workstation 4.0 Developer Edition
 * Microsoft Windows NT Server 3.51
 * Microsoft Windows NT Server 4.0 Standard Edition

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This article was previously published under Q176322



SYMPTOMS
For Far East versions of Windows NT that use DBCS character sets, passing a NULL LpnFit parameter to the GetTextExtentExPoint API may cause an access violation (AV). A Dr. Watson dialog box appears similar to:

An application error has occurred and an application error log is being

generated.

XXX.EXE

Exception: access violation (0xc0000005), Address: 0x77f52edb

NOTE: Xxx.exe is your custom application. Also, the address may be different, but the access violation code should be the same.



CAUSE
Debug analysis shows this error occurs the first time the contents of NULL LpnFit is accessed.



RESOLUTION
Obtain the updated Gdi32.dll file, for the Far East versions of Windows NT that use DBCS character sets.

To resolve this problem, obtain the latest service pack for Windows NT 4.0 or Windows NT Server 4.0, Terminal Server Edition. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

152734 How to Obtain the Latest Windows NT 4.0 Service Pack



STATUS
Microsoft has confirmed that this is a problem in Windows NT 4.0 and Windows NT Server 4.0, Terminal Server Edition. This problem was first corrected in Windows NT 4.0 Service Pack 4.0 and Windows NT Server 4.0, Terminal Server Edition Service Pack 4.

Microsoft has confirmed this to be a problem in Windows NT version 3.51. We are researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.

Keywords: kbhotfixserver kbqfe kbbug kbfix KB176322

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