Private Declare Function SendMessage Lib "user32.dll" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As LongPrivate Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As LongPrivate Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long
Function sqrx(ByVal x As Double) As String '计算平方根（比VB DOUBLE 类型精度高） Dim temp As String, i As Long, j As Long Shell "Calc.EXE", vbMinimizedNoFocus '运行计算器 temp = x & "y0.5=" For i = 1 To Len(temp) SendKeys Mid(temp, i, 1), True '向计算器顺序发送按键消息X (X^Y) 0.5=Next
temp = String(64, Chr(0))i = FindWindow(vbNullString, "计算器") '窗口句柄j = FindWindowEx(i, ByVal 0&, "Edit", vbNullString) '编辑框句柄SendMessage j, &HD, Len(temp), ByVal temp '发送编辑框文本至tempSendKeys "%{F4}", True '调用ALT+F4关闭计算器窗口sqrx = tempEnd Function
Private Sub Command1_Click() Dim i As Integer For i = 17 To 24 Debug.Print "sqrx(" & i & ")=" & sqrx(i) NextEnd Sub
