获得VB listbox 选中项目(多项)的一个好方法

传统方法是遍历一遍

如果listbox 项目过多

明显速度不行

好方法是通过sendmessge发消息给listbox让他把选中项目直接传到参数数组中

You can use the SendMessage() API function instead.

As you probably know, this function lets you send a message to one or more windows. The declaration statement conforms to the following syntax:

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

Since we want to gather the listbox: selected items, we'll send the LB_GETSELITEMS constant in the wMsg argument, which you declare like so:

Private Const LB_GETSELITEMS = &H191

The LB_GETSELITEMS message fills an array with the index numbers of all the selected items.

Dim ItemIndexes() As Long, x As Integer, iNumItems As Integer

iNumItems = ThisBox.SelCount

If iNumItems Then

   ReDim ItemIndexes(iNumItems - 1)

   SendMessage ListBox1.hwnd, LB_GETSELITEMS, iNumItems, ItemIndexes(0)

End If

For x = 0 To iNumItems - 1

   MsgBox ListBox1.List(ItemIndexes(x)) '弹出对话框

Next x

After being passed to the SendMessage function, iNumItems holds the total number of selected items, and the ItemIndexes array holds the selected item index values. Notice, that you must pass a pointer to the ItemIndexes array, and not the array itself. Thus, we passed ItemIndexes(0) into the SendMessage function, not ItemIndexes().