You can send AutoCAD commands with the SendCommand method. You have to be careful using it though. AutoCAD works at its own speed when executing a SendCommand method and simultaneously, VBA works on its own speed. You need to write your code to account for this.
eg
ThisDrawing.SendCommand "_Circle" & vbCr & "2,2,0" & vbCr & "4" & vbCr
ThisDrawing.SendCommand "_zoom" & vbCr & "a" & vbCr
"Everybody is ignorant, only on different subjects." — Will Rogers