↓利用方法
[[dlg.InitialDirectory = this.GetProgDir();]]

@DIV
private String GetProgDir() {

	String[] arg = Environment.GetCommandLineArgs();

	String delimStr = @"\";
	Char[] delimiter = delimStr.ToCharArray();
	String[] aData = arg[0].Split(delimiter);
	String pgDir = String.Join(@"\", aData, 0, aData.Length - 1);

	return pgDir;

}
@END