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 Long Private Const LB_GETITEMHEIGHT = &H1A1 Private Const LB_SETITEMHEIGHT = &H1A0 Dim lstH As LongPrivate Sub Command1_Click() lstH = SendMessage(List1.hwnd, LB_GETITEMHEIGHT, 0, ByVal 0&) MsgBox "列表框条目原来的高度是:" & lstH, , "" Command2.Enabled = True Command3.Enabled = True Command4.Enabled = True End SubPrivate Sub Command2_Click() Dim temp As Single Dim lstHtemp As Long temp = InputBox("请输入列表框条目的新的高度(原来高度的倍数)") lstHtemp = CLng(temp * lstH) SendMessage List1.hwnd, LB_SETITEMHEIGHT, 0, ByVal lstHtemp List1.Refresh MsgBox "列表框条目的新高度势:" & lstHtemp, , "" End SubPrivate Sub Command3_Click() SendMessage List1.hwnd, LB_SETITEMHEIGHT, 0, ByVal lstH List1.Refresh End SubPrivate Sub Command4_Click() Unload Me End SubPrivate Sub Form_Load() List1.AddItem "AAAAAAAAAA" List1.AddItem "BBBBBBBBBBBBBB" List1.AddItem "CCCCCCCCCCCCCCCCCCCC" List1.AddItem "DDDDDDDDDDDDD"
Private Const LB_GETITEMHEIGHT = &H1A1
Private Const LB_SETITEMHEIGHT = &H1A0
Dim lstH As LongPrivate Sub Command1_Click()
lstH = SendMessage(List1.hwnd, LB_GETITEMHEIGHT, 0, ByVal 0&)
MsgBox "列表框条目原来的高度是:" & lstH, , ""
Command2.Enabled = True
Command3.Enabled = True
Command4.Enabled = True
End SubPrivate Sub Command2_Click()
Dim temp As Single
Dim lstHtemp As Long
temp = InputBox("请输入列表框条目的新的高度(原来高度的倍数)")
lstHtemp = CLng(temp * lstH)
SendMessage List1.hwnd, LB_SETITEMHEIGHT, 0, ByVal lstHtemp
List1.Refresh
MsgBox "列表框条目的新高度势:" & lstHtemp, , ""
End SubPrivate Sub Command3_Click()
SendMessage List1.hwnd, LB_SETITEMHEIGHT, 0, ByVal lstH
List1.Refresh
End SubPrivate Sub Command4_Click()
Unload Me
End SubPrivate Sub Form_Load()
List1.AddItem "AAAAAAAAAA"
List1.AddItem "BBBBBBBBBBBBBB"
List1.AddItem "CCCCCCCCCCCCCCCCCCCC"
List1.AddItem "DDDDDDDDDDDDD"
Command1.Caption = "显示原高度"
Command2.Caption = "设置新高度"
Command3.Caption = "恢复原高度"
Command4.Caption = "退 出"
Form1.Caption = "用列表框消息设置条目高度"
Command2.Enabled = False
Command3.Enabled = False
Command4.Enabled = False
End Sub
csdn真是卧虎藏龙
看来api还是要好好学学
可以告诉我这些资料你是从哪里得来的吗?
Visual Basic 6.0 Win32 API 程序设计
刘炳文 李凤华 编著
清华大学出版社 出版