SetPoints and GetPoints methods are not wrapped properly in C++ development environments

Description

In Microsoft's Visual C++, if you open up the MoPoints header file, the methods are
commented out as such:

// method 'SetPoints' not emitted because of invalid return type or
parameter type
// method 'GetPoints' not emitted because of invalid return type or
parameter type

In C++ Builder, these methods are not wrapped at all.

Cause

SetPoints() and GetPoints() methods are not getting wrapped properly.

Solution or Workaround

1. Create SafeArrays to hold your x,y,z, and m values:
   
   

   Code:
   SAFEARRAYBOUND sab;
   SAFEARRAY* psaX;
   SAFEARRAY* psaY;
   SAFEARRAY* psaZ;
   SAFEARRAY* psaM;
   
   unsigned int i;
   long idx[1];
   double valX = -100;
   double valY = 50;
   double mz = 0;
   
   //Set bounds of safearrays.
   sab.cElements = 3;
   sab.lLbound = 0;
   
   //Allocate and initialize data for array.
   psaX = SafeArrayCreate(VT_R8, 1, &sab);
   psaY = SafeArrayCreate(VT_R8, 1, &sab);
   psaZ = SafeArrayCreate(VT_R8, 1, &sab);
   psaM = SafeArrayCreate(VT_R8, 1, &sab);
   
   //Fill arrays with your values.
   //We use arbitrary values here.
   for (i=0; i<3; i++)
   {
   	idx[0]= i;
   
   	SafeArrayPutElement(psaX,idx,&valX);
   	SafeArrayPutElement(psaY,idx,&valY);
   	SafeArrayPutElement(psaZ,idx,&mz);
   	SafeArrayPutElement(psaM,idx,&mz);
   	valX = valX + -10;
   	valY = valY + -10;
   }

   
   
   
2. Map the SetPoints member method:
   
   

   Code:
   wchar_t *szSetPoints[] = {L"SetPoints"};
   DISPID dispidSetPoints = NULL;
   LPDISPATCH pDisp = (LPDISPATCH)m_pts;//m_pts is your CMoPoints object
   HRESULT res = pDisp->GetIDsOfNames(IID_NULL, szSetPoints, 1, LOCALE_USER_DEFAULT, &dispidSetPoints);
   

   
   
   
3. Set the arguments for the SetPoints method:
   
   

   Code:
   DISPID namedargsSetPoints = DISPID_PROPERTYPUT;
   DISPPARAMS putparamsSetPoints;	
   putparamsSetPoints.cNamedArgs = 0;
   

   
   
   If you are only setting the x and y coordinates (no z and m values):
   
   

   Code:
   putparamsSetPoints.cArgs = 2;
   putparamsSetPoints.rgdispidNamedArgs = &namedargsSetPoints;
   
   putparamsSetPoints.rgvarg = new VARIANTARG[2];
   
   putparamsSetPoints.rgvarg[0].vt = VT_ARRAY|VT_R8|VT_BYREF;
   putparamsSetPoints.rgvarg[0].pparray = &psaY;
   putparamsSetPoints.rgvarg[1].vt = VT_ARRAY|VT_R8|VT_BYREF;
   putparamsSetPoints.rgvarg[1].pparray = &psaX;
   

   
   
   If you are setting x,y,z, and m values:
   
   

   Code:
   putparamsSetPoints.cArgs = 4;
   putparamsSetPoints.rgvarg = new VARIANTARG[4];
   putparamsSetPoints.rgvarg[0].vt = VT_ARRAY|VT_R8|VT_BYREF;
   putparamsSetPoints.rgvarg[0].pparray = &psaM;
   putparamsSetPoints.rgvarg[1].vt = VT_ARRAY|VT_R8|VT_BYREF;
   putparamsSetPoints.rgvarg[1].pparray = &psaZ;
   putparamsSetPoints.rgvarg[2].vt = VT_ARRAY|VT_R8|VT_BYREF;
   putparamsSetPoints.rgvarg[2].pparray = &psaY;
   putparamsSetPoints.rgvarg[3].vt = VT_ARRAY|VT_R8|VT_BYREF;
   putparamsSetPoints.rgvarg[3].pparray = &psaX;
   

   
   
   
4. Invoke the method:
   
   

   Code:
   EXCEPINFO excepinfo;
   res = pDisp->Invoke(dispidSetPoints, IID_NULL, LOCALE_USER_DEFAULT, DISPATCH_METHOD, &putparamsSetPoints, NULL, &excepinfo, NULL);
   
   if (SUCCEEDED(res))
   {
      //...
   }
   

   
   
5. Clean up:
   
   

   Code:
   SafeArrayDestroy(psaX);
   SafeArrayDestroy(psaY);
   SafeArrayDestroy(psaZ);
   SafeArrayDestroy(psaM);