
ProMfgdbExprValueTypeGet | |
( ProMfgdbExpression expression /* (In) The expression. */ ProParamvalueType* p_value_type /* (Out) The attribute value type ( PRO_PARAM_DOUBLE, PRO_PARAM_STRING... ). */ ) |

The function successfully retrived the value. | |
The expression handle was invalid or did not contain a value. |

