(转)使用一个下拉框或文本框+列表框的方式实现类似IE地址栏自动完成的功能

王朝other·作者佚名  2006-01-09
窄屏简体版  字體: |||超大  

转自"问专家:QA003240"

可以使用一个下拉框或文本框+列表框的方式实现。这样做的好处是下拉框的内容不一定是URL,可以是任意内容。下面是一个用下拉框实现的示例:

' *************Declarations

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 Const WM_SETREDRAW As Long = &HB&

Private Const CB_FINDSTRING As Long = &H14C&

*************Here is the sub that will implement auto search

Public Sub SearchCombo(InControl As Object)

On Error GoTo trap

Dim StrPos As Long

Dim lPos As Long

Dim SearchStr As String

If TypeOf InControl Is ComboBox Then

StrPos = InControl.SelStart

SearchStr = Left$(InControl.Text, StrPos)

lPos = SendMessage(InControl.hwnd, CB_FINDSTRING, 0, ByVal SearchStr)

If lPos >= 0 Then

InControl.Text = InControl.List(lPos)

InControl.ListIndex = lPos

End If

With InControl

.SelStart = StrPos

.SelLength = Len(InControl.Text)

End With

End If

Exit Sub

trap:

MsgBox Err.Description

End Sub

'**************Implement it like this************

Private Sub cboParent_Change()

Call SearchCombo(cboParent) '<--pass the combo box to the sub by name

End Sub

此问题由vbfan回答。

 
 
 
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