This function retrieves an ImageGear Error Code and associated information from the error stack.
Declaration:
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VOID ACCUAPI IG_error_get( INT iErrorIndex, LPSTR szFileName, INT cbFileNameSize, LPINT lpiLineNumber, LPAT_ERRCODE lpiCode, LPAT_INT lplValue1, LPAT_INT lplValue2 ); |
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Arguments:
| iErrorIndex | Tells which error to fetch from stack. A value of 0 means fetch the first error placed on the stack. |
| szFileName | Pointer indicating where to return the module name in which this error occurred. If this pointer is NULL, the module name is not returned. |
| cbFileNameSize | Number of bytes available in byte array pointed to by szFileName. |
| lpiLineNumber | Pointer indicating where to return the line number at which the error occurred. If NULL, the line number is not returned. |
| lpiCode | Pointer indicating where to return the Error Code. If NULL, the Error Code is not returned. |
| lplValue1 | Pointer indicating where to return a value stored as lValue1 when the error occurred. If NULL, this value is not returned. See Remarks below for explanation of lValue1 and lValue2. |
| lplValue2 | Pointer indicating where to return a value stored as lValue2 when the error occurred. If NULL, this value is not returned. See Remarks below for explanation of lValue1 and lValue2. |
Return Value:
None
Supported Raster Image Formats:
This function does not process image pixels.
Sample:
MFC Threads, MFC
Example:
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INT i; // Will hold Loop Index and Error Index INT iLineNumber; // Will hold returned Line Number BYTE szFileName[30]; // Will hold ret'd module name, up to 29 chars INT cbFileNameSize; // Will hold size of szFileName array AT_INT lValue1, lValue2;// Will hold returned lValue1, lValue2 AT_ERRCODE iCode; // Will hold returned ImageGear Error Code AT_ERRCOUNT nErrcount; // Will hold count of errors on error stack TCHAR szBuf[60]; // Will hold zero-terminated string returned by wsprintf() below cbFileNameSize = 30; // Size of module-name array nErrcount = IG_error_check(); // Get number of errors on stack for ( i = 0; i < nErrcount; i++ ) { // Get Module Name, Line Number, Error Code, and lValue1, lValue2: IG_error_get ( i, (LPSTR) &szFileName, cbFileNameSize, &iLineNumber, (LPAT_ERRCODE)&iCode, (LPAT_INT) &lValue1, (LPAT_INT) &lValue2 ); // Format error message in szBuf: wsprintf ( szBuf, _T("Error %d in Module %s at Line %d"), iCode, szFileName, iLineNumber ); // Display error message in a Message Box, with heading "Error" : MessageBox ( NULL, szBuf, _T("Error"), MB_OK ); } IG_error_clear(); // Done getting errors, clear the error stack |
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Remarks:
Set iErrorIndex to indicate which error to get. iErrorIndex = 0 means the error added to the stack first. The other arguments (except cbFileNameSize) are pointers telling this function where to return the retrieved information to you. This information consists of the Error Code, the module name and line number at which the error occurred, and two additional values (lValue1 and lValue2) which may provide additional information about the error. See Appendix: Function Error Return Codes for a list of all ImageGear Error Codes and the significance of lValue1, lValue2 where applicable.
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To determine the number of errors currently on the error stack use IG_error_check. After fetching all error information you need using IG_error_get, use IG_error_clear to clear the stack. |
A call to this function has the same effect as a call to IG_err_error_get with nLevel equal to 0 and lpExtraText equal to NULL.