>>rc = SendMessage(Me.hwnd, wm_settext, 0, ByVal cap)
rc 是 SendMessage 的返回值, 也就是 FALSE, SendMessage 调用失败了:)
试试下面:Option ExplicitPrivate Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As LongPrivate Sub Command1_Click()
Dim rc As Long
Dim cap As String
cap = "12345"
rc = SendMessage(Me.hwnd, &HC, 0, ByVal cap)
MsgBox rc
End Sub
rc 是 SendMessage 的返回值, 也就是 FALSE, SendMessage 调用失败了:)
试试下面:Option ExplicitPrivate Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As LongPrivate Sub Command1_Click()
Dim rc As Long
Dim cap As String
cap = "12345"
rc = SendMessage(Me.hwnd, &HC, 0, ByVal cap)
MsgBox rc
End Sub
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但不行
已经帮你解答了,仔细看看啦
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Any) As LongPrivate Const WM_SETTEXT = &HC
Private Sub Command1_Click()
Dim rc As Long
Dim cap As String
cap = "12345"
SendMessage Me.hwnd, &HC, Len(cap), ByVal cap
End Sub