Excel VBA 插入指定图片到单元格并只适应大小

Sub 插入图片()

Dim filenames As String
Dim filefilter1 As String

filefilter1 = ("所有图片文件（*.jpg;*.bmp;*.png;*.gif）,*.jpg;*.bmp;*.png;*.gif")    '所有图片文件后面的括号为中文括号
filenames = Application.GetOpenFilename(filefilter1, , "请选择一个图片文件", , MultiSelect:=False)

'没有选中文件时，做容错处理
If filenames = "False" Then
Exit Sub
End If

'插入图片到指定的单元格
Sheet1.Pictures.Insert(filenames).Select

'图片自适应单元格大小
On Error Resume Next
Dim picW As Single, picH As Single
Dim cellW As Single, cellH As Single
Dim rtoW As Single, rtoH As Single
cellW = ActiveCell.Width
cellH = ActiveCell.Height
picW = Selection.ShapeRange.Width
picH = Selection.ShapeRange.Height
rtoW = cellW / picW * 0.95
rtoH = cellH / picH * 0.95
If rtoW < rtoH Then
    Selection.ShapeRange.ScaleWidth rtoW, msoFalse, msoScaleFromTopLeft
Else
    Selection.ShapeRange.ScaleHeight rtoH, msoFalse, msoScaleFromTopLeft
End If
picW = Selection.ShapeRange.Width
picH = Selection.ShapeRange.Height
Selection.ShapeRange.IncrementLeft (cellW - picW) / 2
Selection.ShapeRange.IncrementTop (cellH - picH) / 2

End Sub