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_EdLastError( ) API Library Routine

  • Article

_EdLastError( ) returns the error number of the most recent editor error associated with the specified editing window.

int _EdLastError(WHANDLE wh)
WHANDLE wh;            /* Handle of editing window. */

Example

The following example displays the error code returned by _EdLastError( ) after a number of editor operations. Since editor errors are reserved for severe situations, such as low memory, the following example will usually display an error code of 0.

Visual FoxPro Code

SET LIBRARY TO EDLASTER
= EDLASTERR("x")  && displays _EdLastError() after operations on file "x"

C 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);
}

FAR Example(ParamBlk FAR *parm)
{
   char FAR *pFileName;
   WHANDLE wh;
   EDENV EdEnv;

   if (!_SetHandSize(parm->p[0].val.ev_handle,
      parm->p[0].val.ev_length+1))
   {
      _Error(182); // "Insufficient memory"
   }
   _HLock(parm->p[0].val.ev_handle);
   pFileName = (char FAR *) _HandToPtr(parm->p[0].val.ev_handle);
   pFileName[parm->p[0].val.ev_length] = '\0';

   wh = _EdOpenFile(pFileName, FO_READONLY);
   _HUnLock(parm->p[0].val.ev_handle);

//   Position past end of file
   _EdGetEnv(wh, &EdEnv);
   _EdSetPos(wh, EdEnv.length + 128);
   _PutStr("\n_EdLastError() ="); putLong(_EdLastError(wh));

//   _EdCopy() with no selection
   _EdSetPos(wh, 1);
   _EdCopy(wh);
   _PutStr("\n_EdLastError() ="); putLong(_EdLastError(wh));

//   _EdScrollToSel() with no selection
   _EdScrollToSel(wh, TRUE);
   _PutStr("\n_EdLastError() ="); putLong(_EdLastError(wh));
}

FoxInfo myFoxInfo[] = {
   {"EDLASTERR", (FPFI) Example, 1, "C"},
};
FoxTable _FoxTable = {
   (FoxTable FAR *) 0, sizeof(myFoxInfo)/sizeof(FoxInfo), myFoxInfo
};

See Also

_EdGetEnv( ) API Library Routine | _EdSetEnv( ) API Library Routine | Accessing the Visual FoxPro API