Question

VB窗体怎样调用CAD并在里面画园

我用VB写了一个窗体软件，想在这个窗体里面输入数据之后，在CAD里面画出相应的矩形。
这个功能呢个应该怎么实现啊
求代码。

Answer 1

　　On Error Resume Next
Set myAcadApp = GetObject(, "Autocad.Application") '检查AutoCAD是否已经打开
If Err <> 0 Then '没有打开
Err.Clear
Set myAcadApp = CreateObject("Autocad.Application") '打开CAD
If Err Then
MsgBox Err.Number & ":" & Err.Description '打开失败
Exit Sub
End If
End If
On Error GoTo prcERR
myAcadApp.Visible = True '显示CAD
Set activeDoc = myAcadApp.ActiveDocument
Dim startPoint(0 To 2) As Double
Dim endPoint(0 To 2) As Double
Dim LineObj As AcadLine'如果画图时出错，改为Dim LineObj As Object
startPoint(0) = 0: startPoint(1) = 0: startPoint(2) = 0
endPoint(0) = 30: endPoint(1) = 20: endPoint(2) = 0
Set LineObj = activeDoc.ModelSpace.AddLine(startPoint, endPoint) '画线

prcExit:
Set activeDoc = Nothing
Set myAcadApp = Nothing
Exit Sub
prcERR:
MsgBox Err.Number & ":" & Err.Description, vbCritical, "错误"
Resume prcExit
End Sub