程序代码：

Option Explicit

Private Declare Function SetParent Lib "user32" (ByVal hWndChild As Long, ByVal hWndNewParent As Long) As Long
Private Declare Function MoveWindow Lib "user32" (ByVal hwnd As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal bRepaint As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Dim pid As Long

Private Sub Form_Load()
Dim xlApp As Excel.Application, xlBook As Excel.Workbook, xlsheet As Excel.Worksheet
    
    Me.Height = 10245
    Me.Width = 11745
    Set xlApp = CreateObject("Excel.Application")
    xlApp.Visible = True
    Set xlBook = xlApp.Workbooks.Add
    pid = FindWindow("XLMAIN", "Microsoft Excel - Book1")
    SetParent pid, Me.hwnd
    MoveWindow pid, 0, 0, 780, 650, True
    Set xlsheet = xlBook.Sheets(1)
    xlsheet.Activate
    
End Sub

Private Sub Form_Unload(Cancel As Integer)
    Call KillProcess("EXCEL.EXE")
    Unload Me
End Sub