Get and Set Units Example (C++ COM)

This example shows how to get the current unit settings of the document and change them to inches. Be sure to import swconst.tlb.

The method IModelDoc2::IGetUnits returns an array, so this code must be used in an in-process DLL. Otherwise, use the method IModelDoc2::GetUnits that returns a VARIANT.

GetAndSetUnits(ISldWorks* m_pSldWorks)

{

 LPMODELDOC2 pModelDoc = NULL;

 // Retrieve Model Document pointer

 if( S_OK != m_pSldWorks->get_IActiveDoc2( &pModelDoc ) || pModelDoc == NULL )

  return;  

 short unitArray[5];

 HRESULT hres = S_OK;

 hres = pModelDoc->IGetUnits(unitArray);

 CString message;    // Create message string

 message.Format(_T("Unit Settings are:\n%d \t%d \t%d \t%d \t%d"),

 unitArray[0],unitArray[1],unitArray[2],unitArray[3],unitArray[4]);

 // Send message to the user

 AfxMessageBox (message);   

 // If units are not inches, change them to inches

 if (unitArray[0] != swINCHES)

 {

  short denom = 16;

  hres = pModelDoc->SetUnits(swINCHES, swFRACTION, denom, unitArray[3], FALSE);

 }

 pModelDoc->Release();

}