int ImportSVTxtRangeDataFile(Page &pgTarget, TreeNode &trFilter, LPCSTR lpcszFile, int nFile)
{
// set redirection
int iRedirection = _REDIRECTION_OUTPUT_RESULTLOG("ImportSVTxtRangeDataFile ", true);
int iRet;
	
// check filter type
if( trFilter.Type.nVal != FILTER_TYPE_USERDEFINED )
	return 1;	// EXIT

// check existance of pgTarget
if( EXIST_WKS != pgTarget.GetType() )
	return 1;	// EXIT

Worksheet wks(pgTarget.GetName());
if( !wks.IsValid() )
	return 1;	// EXIT

// import data
// ----
// here would be one possibility to place the uncompressing code
// ----
// here my own import filter function is called,
// maybe it is more efficient to place the uncompressing code
// within the import-function ...
svTxtData data(lpcszFile); // this is a class I created to capsulate
                           // our txt data handling
iRet = data.importASCIIFilter(wks); // call the import member function

// Reset Redirection
_REDIRECTION_RESET(iRedirection);

return iRet;
}