_ErrorInfo( ) API Library Routine


int _ErrorInfo(int code, char FAR message) int code; / Internal Visual FoxPro error number. / char FAR message; /* Pointer to space for an error message. */

The message parameter is a pointer to a character string that is the Visual FoxPro error message. If message isn't a null pointer, Visual FoxPro fills in the error message text associated with the external error number.

For more information on how to create an API library and integrate it with Visual FoxPro, see Accessing the Visual FoxPro API.

The following example shows the information returned by _ErrorInfo( ).

Visual FoxPro Code

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SET LIBRARY TO ERRORINF = ERRORINFO(0) = ERRORINFO(1)

C Code

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#include <pro_ext.h> void putLong(long n) { Value val; val.ev_type = 'I'; val.ev_long = n; val.ev_width = 10; _PutValue(&val); } void FAR ErrorInfo(ParamBlk FAR parm) { int ext; char FAR message; if ((message =_Alloca(128)) == 0) { _Error(182); // "Insufficient memory" } ext = _ErrorInfo((int) parm->p[0].val.ev_long, message); _PutChr('\n'); putLong(ext); _PutStr(" "); _PutStr(message); } FoxInfo myFoxInfo[] = { {"ERRORINFO", (FPFI) ErrorInfo, 1, "I"}, }; FoxTable _FoxTable = { (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo };

Copy Code

#include <pro_ext.h>
void putLong(long n)
{
   Value val;
   val.ev_type = 'I';
   val.ev_long = n;
   val.ev_width = 10;
   _PutValue(&val);
}
void FAR ErrorInfo(ParamBlk FAR *parm)
{
   int ext;
   char FAR *message;
   if ((message =_Alloca(128)) == 0)
   {
      _Error(182); // "Insufficient memory"
   }
   ext = _ErrorInfo((int) parm->p[0].val.ev_long, message);
   _PutChr('\n'); putLong(ext); _PutStr(" "); _PutStr(message);
}
FoxInfo myFoxInfo[] = {
   {"ERRORINFO", (FPFI) ErrorInfo, 1, "I"},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

Reference

_Error( ) API Library Routine
_UserError( ) API Library Routine

Other Resources

API Library Construction
Accessing the Visual FoxPro API

Remarks

Example

Visual FoxPro Code

C Code

See Also

Reference

Other Resources