I have a CMYK document opened in photoshop. In "CHANNELS" panel, I just added 2 spot colors with the same name "Sport Color 1".

As I click any of the spot channel to select it, the "Listener" plugin will output some c++ code like below:

SPErr PlayeventSelect(/*your parameters go here*/void)
{
     PIActionDescriptor result = NULL;
     DescriptorTypeID runtimeKeyID;
     DescriptorTypeID runtimeTypeID;
     DescriptorTypeID runtimeObjID;
     DescriptorTypeID runtimeEnumID;
     DescriptorTypeID runtimeClassID;
     DescriptorTypeID runtimePropID;
     DescriptorTypeID runtimeUnitID;
     SPErr error = kSPNoError;
     // Move this to the top of the routine!
     PIActionDescriptor desc0000000000003980 = NULL;

     error = sPSActionDescriptor->Make(&desc0000000000003980);
     if (error) goto returnError;

          // Move this to the top of the routine!
          PIActionReference ref0000000000001A48 = NULL;
          error = sPSActionReference->Make(&ref0000000000001A48);
          if (error) goto returnError;

          error = sPSActionReference->PutName(ref0000000000001A48, classChannel, "Spot Color 1");
          if (error) goto returnError;

     error = sPSActionDescriptor->PutReference(desc0000000000003980, keyNull, ref0000000000001A48);
     if (error) goto returnError;

     error = sPSActionControl->Play(&result, eventSelect, desc0000000000003980, plugInDialogSilent);
     if (error) goto returnError;

returnError:
     if (result != NULL) sPSActionDescriptor->Free(result);
     if (desc0000000000003980 != NULL) sPSActionDescriptor->Free(desc0000000000003980);
     if (ref0000000000001A48 != NULL) sPSActionReference->Free(ref0000000000001A48);
     return error;
}

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You can see "PutName" add the channel name "Spot Color 1" to reference, and I think it will not work correctly if I add such code to my project since PS cannot differentiate the 2 channels only by name. Can anyone tell me if there's any other method for selecting spot channel? Thanks in advance.