| 以下状况假设我在 Form_Load 中自动下拉 Combo1.
′以下声明用于16位
Const WM_USER = &H400
Const CB_SHOWDROPDOWN = (WM_USER + 15)
Private Declare Function SendMessage Lib "User" (ByVal hwnd As Integer, _
ByVal wMsg As Integer, ByVal wParam As Integer, lParam As Any) As Long
′以下声明用于32位
Const CB_SHOWDROPDOWN = &H14F
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" _
(ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, _
lParam As Any) As Long
Private Sub Form_Load()
Combo1.AddItem "11111"
Combo1.AddItem "22222"
Combo1.AddItem "33333"
Combo1.AddItem "44444"
Combo1.AddItem "55555"
Combo1.AddItem "66666"
′Form_Load 即自动下拉 Combo1
Dim nret As Long
nret = SendMessage(Combo1.hwnd, CB_SHOWDROPDOWN, 1, ByVal 0&)
End Sub
让ComboBox自动下拉 |
