Something

CString MasterFile;

void CCompilerDlg::OnMasterButton() 
{
	CFileDialog fileDlg(TRUE,NULL,NULL,OFN_OVERWRITEPROMPT,"Text Files (*.txt)|*.txt|");
	
	if (fileDlg.DoModal() == IDOK)
	{
		MasterFile = fileDlg.GetPathName();
		SetDlgItemText(IDC_MASTERPATH, fileDlg.GetPathName());
		GetDlgItem(IDC_INPUTBUTTON)->EnableWindow(TRUE);
	}
}