📄 使combobox的选项内容显示完全_mysky.htm
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Long<BR> For i = 0 To
50<BR> Combo1.AddItem
i</P>
<P>Next<BR>End Sub</P>
<P></P>
<P><BR>'*************************************************************************<BR>'**模
块 名：Combo<BR>'**说 明：丹心软件设计 版权所有2007 -
2008(C)<BR>'**创 建 人：丹心 <A
href="http://hi.baidu.com/starwork">http://hi.baidu.com/starwork</A>
<BR>'**日 期：2007-08-04 23:59:59<BR>'**修 改 人：(<A
href="mailto:CNSTARWORK@126.COM">CNSTARWORK@126.COM</A>)<BR>'**日
期：<BR>'**描 述：增加 Combo 下拉表列内为 25
行<BR>'**版
本：V1.0.0<BR>'*************************************************************************</P>
<P>Option Explicit</P>
<P>Const CB_GETITEMHEIGHT = &H154<BR>Const CB_SETITEMHEIGHT =
&H153<BR>Const CB_SHOWDROPDOWN = &H14F<BR>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<BR>Private
Declare Function MoveWindow Lib "user32" (ByVal hwnd As Long, ByVal x As
Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal
bRepaint As Long) As Long</P>
<P>Private Sub Form_Load()<BR> Dim i As
Long<BR> For i = 1 To
50<BR> Combo1.AddItem
Format(i, "00000")<BR> Next
i<BR> Combo1.ListIndex = 0<BR>End Sub</P>
<P>'----- ADD ComboDownHeight<BR>Private Sub
Command1_Click()<BR> Dim 单行高度 As
Long<BR> Dim 下拉N行 As
Long<BR> Me.ScaleMode =
vbPixels<BR> With
Combo1<BR> <BR>
单行高度 = SendMessage(.hwnd, CB_GETITEMHEIGHT, 0, ByVal
0)<BR>
'设定下拉共有几行<BR> 下拉N行 =
25
'行<BR> MoveWindow .hwnd,
.Left, .Top, .Width, 单行高度 * (下拉N行 + 2), 1<BR> End
With<BR> SendMessage Combo1.hwnd, CB_SHOWDROPDOWN,
True, 0&<BR>End Sub</P>
<P></P>
<P><BR>'*************************************************************************<BR>'**模
块 名：Combo<BR>'**说 明：丹心软件设计 版权所有2007 -
2008(C)<BR>'**创 建 人：丹心 <A
href="http://hi.baidu.com/starwork">http://hi.baidu.com/starwork</A>
<BR>'**日 期：2007-08-04 23:59:59<BR>'**修 改
人：<BR>'**日 期：<BR>'**描 述：改变
Combo 控制项高度<BR>'**版
本：V1.0.0<BR>'*************************************************************************</P>
<P>Option Explicit<BR>Const CB_SETITEMHEIGHT = &H153<BR>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</P>
<P>Private Sub Command1_Click()<BR> Dim ComboH As
Long<BR> ComboH = CLng(Combo1.Height /
Screen.TwipsPerPixelX)<BR> ComboH = CLng(ComboH *
3) '3倍高度<BR> SendMessage
Combo1.hwnd, CB_SETITEMHEIGHT, -1&, ByVal ComboH<BR>End Sub</P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P></P>
<P><BR>Option Explicit</P>
<P>Private Declare Function SendMessage Lib "USER32" Alias "SendMessageA"
(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam
As Long) As Long<BR>Private Const CB_GETDROPPEDWIDTH =
&H15F<BR>Private Const CB_SETDROPPEDWIDTH = &H160<BR>Private Const
CB_ERR = -1</P>
<P>' 取得 Combo 下拉的宽度<BR>' 可以利用该函数比例放大或缩小宽度<BR>Public Function
GetDropdownWidth(cboHwnd As Long) As Long<BR>Dim lRetVal As
Long<BR>lRetVal = SendMessage(cboHwnd, CB_GETDROPPEDWIDTH, 0, 0)<BR>If
lRetVal <> CB_ERR Then<BR> GetDropdownWidth
= lRetVal<BR> '单位为
pixels<BR>Else<BR> GetDropdownWidth = 0<BR>End
If<BR>End Function<BR>'设置 Combo 下拉的宽度<BR>'单位为 pixels<BR>Public Function
SetDropdownWidth(cboHwnd As Long, NewWidthPixel As Long) As Boolean<BR>Dim
lRetVal As Long<BR>lRetVal = SendMessage(cboHwnd, CB_SETDROPPEDWIDTH,
NewWidthPixel, 0)<BR>If lRetVal <> CB_ERR
Then<BR> SetDropdownWidth =
True<BR>Else<BR> SetDropdownWidth = False<BR>End
If<BR>End Function</P>
<P><BR>Private Sub Command1_Click()<BR>SetDropdownWidth Combo1.hwnd,
GetDropdownWidth(Combo1.hwnd) * 2<BR>End Sub</P>
<P></P>
<P></P>
<P></P>
<P></P>
<P><BR>Option Explicit</P>
<P>Private Declare Function SendMessage Lib "USER32" Alias "SendMessageA"
(ByVal hwnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam
As Long) As Long</P>
<P>Private Const CB_SETDROPPEDWIDTH = &H160<BR>Private Const CB_ERR =
-1</P>
<P>'设置 Combo 下拉的宽度<BR>'单位为 pixels<BR>Public Function
SetDropdownWidth(cboHwnd As Long, NewWidthPixel As Long) As
Boolean<BR> Dim lRetVal As
Long<BR> lRetVal = SendMessage(cboHwnd,
CB_SETDROPPEDWIDTH, NewWidthPixel, 0)<BR> If
lRetVal <> CB_ERR
Then<BR>
SetDropdownWidth = True<BR>
Else<BR>
SetDropdownWidth = False<BR> End If<BR>End
Function</P>
<P>'根据Combo1的内容长度自动调整<BR>Private Sub
Combo1_DropDown()<BR> Dim i As
Integer<BR> Dim w As Long, wl As
Long <BR> <BR>
'取长度最长的一项宽度,并从Twips转换成Pixels<BR> For i = 0 To
Combo1.ListCount-1<BR> wl
= TextWidth(Combo1.List(i)) /
Screen.TwipsPerPixelX<BR>
If w < wl Then w = wl<BR>
Next<BR> <BR>
'设置下拉框列表宽度,后面40约是滚动条宽度的两倍<BR> SetDropdownWidth
Combo1.hwnd, w + 40<BR>End Sub</P></DIV></TD></TR></TBODY></TABLE><BR>
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