Sendkeys 和 Sendmessage 使用技巧一例 选择自 northwolves 的 Blog

王朝other·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

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 Long

Private Declare Function FindWindow Lib "user32.dll" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Private 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temp

SendKeys "%{F4}", True '调用ALT+F4关闭计算器窗口

sqrx = temp

End Function

Private Sub Command1_Click()

Dim i As Integer

For i = 17 To 24

Debug.Print "sqrx(" & i & ")=" & sqrx(i)

Next

End Sub

返回:

sqrx(17)=4.1231056256176605498214098559741

sqrx(18)=4.2426406871192851464050661726291

sqrx(19)=4.3588989435406735522369819838596

sqrx(20)=4.4721359549995793928183473374626

sqrx(21)=4.582575694955840006588047193728

sqrx(22)=4.6904157598234295545656301135445

sqrx(23)=4.7958315233127195415974380641627

sqrx(24)=4.8989794855663561963945681494118

 
 
 
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