how to print data in tabular format in rich edit control

I am a novice in application development.
I have created a app which is expected to display following data in RichEditControl2 in tabular format, but i am facing issue with character spacing.

Date MilsStone Sub
2012-03-12 Requirement/Ticket-Analysis Requirements understanding 2.0
2012-03-14 Design Develop/ Document Design 3.0
2012-03-15 Design Design Review 3.0
2012-03-15 Coding&Unit Testing Develop 4.0

I am unable to set width in this case (using Format() in AddDataToDisplayBox). Please help.

void Csdlc_verifierDlg::AddDataToDisplayBox(int index,COLORREF color, bool bold, bool italic, bool underline)
{
	CString strTemp;
	char buf[255]={0};
	record_data record = mRecData.GetAt(index);	
	strTemp.Format("%-15s%-50s%-50s%-5s%-15s",record.date,record.milestone,record.tasktype,record.effort,record.name);	
	AddLine(strTemp,NEWLINE,color,bold,italic,underline);
}

int Csdlc_verifierDlg::AddLine(CString str, int seperator, COLORREF color, bool bold, bool italic, bool underline)
{			
	int txtLen = mRichEditCtrl.GetTextLength();

	// Save number of lines before insertion of new text
	int nOldLines = mRichEditCtrl.GetLineCount();

	// Initialize character format structure
	CHARFORMAT cf = {0};
	cf.cbSize = sizeof(CHARFORMAT);
	cf.dwMask = CFM_COLOR|CFM_BOLD|CFM_ITALIC|CFM_UNDERLINE|CFM_CHARSET|CFM_SPACING; //Mask validates the active field in this case.
	cf.dwEffects = (bold ? CFE_BOLD : 0) | (italic ? CFE_ITALIC : 0) | (underline ? CFE_UNDERLINE : 0);
	cf.crTextColor = color;
		
	//Add newline character, if required.
	switch(seperator)
	{
	case NEWLINE:
		str.AppendChar('\n');
		break;

	case SPACE:
		str.AppendChar(' ');
		break;
	}
	//Insert data at the end.
	mRichEditCtrl.SetSel(txtLen, -1); // Set the cursor to the end of the text area and deselect everything.
    mRichEditCtrl.ReplaceSel(str); // Inserts when nothing is selected.

    // Apply formating to the just inserted text.
	mRichEditCtrl.SetSel(txtLen-(nOldLines-1), mRichEditCtrl.GetTextLength());
    mRichEditCtrl.SetSelectionCharFormat(cf);
	
	// Scroll by the number of lines just inserted
	mRichEditCtrl.LineScroll(mRichEditCtrl.GetLineCount() - nOldLines);	
	return 0;
}
<code></code>

Tags: C++, MFC