How to modify the symbolic variable text in a drawing using protoolkit?

[YL_10750932]

     I don't know what to do. Here is my code, the function ProDtlsyminstdataVartextsSet() returns the PRO_TK_BAD_INPUTS. It confused me.

ProDtlsyminst sym_inst;
ProDtlsyminstdata data;
ProDtlvartext text;
/*initialize...*/
stutas = ProDtlvartextAlloc((wchar_t*)L"test", (wchar_t*)L"2.5", &text);
status = ProDtlsyminstDataGet(&sym_inst, PRODISPMODE_SYMBOLIC, &data);
status = ProDtlsyminstdataVartextsSet(data, &text);
status = ProDtlsyminstModify(&sym_inst, data);

[YL_10750932 · Accepted solution]

Oh, I solved it! Here is my code. 

void modifySymInstence(ProDtlsyminst &sym_inst, ProDtlvartext &var_text)
{
	ProError status;
	ProDtlsyminstdata data;
	ProDtlvartext *text;
	ProLine prompt, prompt_target, value;
	int size;
	status = ProDtlsyminstDataGet(&sym_inst, PRODISPMODE_SYMBOLIC, &data);
	status = ProDtlsyminstdataVartextsCollect(data, &text);
	ProArraySizeGet(text, &size);
	for (int i = 0; i < size; i++)
	{
		status = ProDtlvartextDataGet(text[i], prompt, value);
		status = ProDtlvartextDataGet(var_text, prompt_target, value);
		if (wcharToString(prompt) != wcharToString(prompt_target))
			continue;
		text[i] = var_text;//It solved my problem
	}

	status = ProDtlsyminstdataVartextsSet(data, text);
	status = ProDtlsyminstErase(&sym_inst);
	status = ProDtlsyminstModify(&sym_inst, data);
	status = ProDtlsyminstShow(&sym_inst);
	ProDtlvartextFree(*text);
}

[YL_10750932]

But I have a new problem. When my program modifies the variable text of the symbol inside the red rectangle, it prompts me to select the direction of the normal. How to select it automatically?