Question

C#sendmessage发送回车键给另外一个程序没有反应怎么解决？

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Answer 1

实际上不必用费劲的常数，模拟按键都是PostMessage
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long

Private Declare Sub keybd_event Lib "user32" (ByVal bVk As Byte, ByVal bScan As Byte, ByVal dwFlags As Long, ByVal dwExtraInfo As Long)

Private Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Long) As Long

Private Const WM_KEYDOWN = &H100

Private Const WM_KEYUP = &H101

Private Sub Command1_Click()
Dim a As Long
a = FindWindow(vbNullString, Text1.Text)
PostMessage a, WM_KEYDOWN, vbKeyReturn, 0
End Sub

keybd_event也可以用这种方法