ChemCAD 5 services to visual basic applications: User Manual, страница 15

Definition        dispinterface IUnitOpSpecUnitConversion

        {

        methods:

short FromInternalUnitsToCurUserUnits(VARIANT specInInternal, VARIANT specInCurUser);

short FromCurUserUnitsToInternalUnits(VARIANT specInCurUser, VARIANT specInInternal);

               short GetUnitOpSpecArrayDimension();

short GetCurUserUnitString(short unitOpID, short parIndex, BSTR* unitString, BSTR* paramName);

               short GetNoOfParameters(short unitOpID);    

        };

Methods          One method need to be called when converting data from current user units to internal units

                        Method             FromCurUserUnitsToInternalUnits        

                        Returns                        number of data items returned

On the other hand, when converting data from internal units to current user units, user calls

Method             FromInternalUnitsToCurUserUnits        

            Returns                        number of data items returned

Following the call to FromInternalUnitsToCurUserUnits, user can get the parameter name and unit string by calling

Method             GetCurUserUnitString

                        Returns                        number of data item returned

                        or call

Description      IEngUnitConversion interface is a general engineering conversion utility. It performs unit conversions between CHEMCAD 5 internal units and the current user units. The unit categories are defined on the following table.

Definition        dispinterface IEngUnitConversion

        {      

        methods:

short FromInternalUnitToCurUserUnit(short engUnitID, float valueInInternal, float* valueInUser, BSTR* userUnitString);