Origin C Improvements

void test_treenode()
{
	Tree tr;
	tr.a.nVal = 10;
	tr.b.strVal = "Fol";
	
	vector<int> vn = {1,2};
	tr.c.nVals = vn;
	vector<string> vs = {"a","b"};
	tr.d.strVals = vs;
	
	tr.e.a.strVals = vs;
	
	TreeNode trA = tr.a;	
	TreeNode trB = tr.b;	
	TreeNode trC = tr.c;
	TreeNode trD = tr.d;
	TreeNode trE = tr.e;
}

BOOL LT_evaluate(LPCSTR lpcszLabTalkExpression, double * lpdbResult);
BOOL LT_get_var(LPCSTR lpcszLabTalkVarName, double * lpdbResult);
BOOL LT_set_var(LPCSTR lpcszLabTalkVarName, double dbValue);
BOOL LT_get_str(LPCSTR lpcszLabTalkString, char* pBuffer, int nBufferSize);
BOOL LT_set_str(LPCSTR lpcszVar, LPCSTR lpcszContent);

int vectorbase::SetSubVector(vectorbase& vbSource, int c1 = 0, int nCount = -1);
int vector<string>::SetSubVector(vectorbase& vbSource, int c1 = 0, int nCount = -1);

void test_GetAdditionalInfo()
{
	Worksheet wks = Project.ActiveLayer();
	Column col(wks, 0);
	string strTextInfo;
	col.GetAdditionalInfo(strTextInfo);
	out_str(strTextInfo);
}