| Visual Basic | C/C++ | Description |
| Boolean | VARIANT_BOOL | Has the value True (-1) or False (0). |
| Color | OLECOLOR | A color. In many containers, colors are treated as 32-bit integers. |
| Double | double | 64-bit floating point number. |
| Double Array | LPSAFEARRAY | An array of doubles. |
| Font | LPFONTDISP | An OLE Automation Interface to a font. |
| Integer | short | 16-bit signed integer. |
| Long | long | 32-bit signed integer. |
| LPUNKNOWN | LPUNKNOWN | |
| Object | LPDISPATCH | A generic OLE Automation Interface. |
| OLE_XPOS_PIXELS | long | |
| OLE_YPOS_PIXELS | long | |
| Picture | LPPICTUREDISP | An OLE Automation Interface to a picture or image. |
| Single | single | 32-bit floating point number. |
| String | BSTR | A string. |
| Variant | LPVARIANT | A variant. |
| Void | void | Nothing. |
| Window | OLE_HANDLE | A handle to a window. |