Private Sub Form_Load()
Dim I As Integer
For I = 0 To 15
List1.AddItem "Color " & I
List2.AddItem "FDSF"
Next
List1.itemData(1) = RGB(255, 0, 0)
List1.itemData(2) = RGB(0, 255, 0)
List1.itemData(3) = RGB(0, 0, 255)
SubLists hWnd
End Sub
Private Type RECT
Left As Long
Top As Long
Right As Long
Bottom As Long
End Type
Private Type DRAWITEMSTRUCT
CtlType As Long '控件类型
CtlID As Long '控件ID
itemID As Long '菜单项、列表框或组合框中某一项的索引值
itemAction As Long '控件行为
itemState As Long '控件状态
hwndItem As Long '父窗口句柄或菜单句柄
hdc As Long '控件对应的绘图设备句柄
rcItem As RECT '控件所占据的矩形区域
itemData As Long '列表框或组合框中某一项的值
End Type
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
Private Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long
Private Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
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 Declare Function CreateSolidBrush Lib "gdi32" (ByVal crColor As Long) As Long
Private Declare Function FillRect Lib "user32" (ByVal hdc As Long, lpRect As RECT, ByVal hBrush As Long) As Long
Private Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long
Private Declare Function SetBkColor Lib "gdi32" (ByVal hdc As Long, ByVal crColor As Long) As Long
Private Declare Function SetTextColor Lib "gdi32" (ByVal hdc As Long, ByVal crColor As Long) As Long
Private Declare Function TextOut Lib "gdi32" Alias "TextOutA" (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal lpString As String, ByVal nCount As Long) As Long
Private Declare Function DrawFocusRect Lib "user32" (ByVal hdc As Long, lpRect As RECT) As Long
Private Declare Function GetSysColor Lib "user32" (ByVal nIndex As Long) As Long
Private Function SubClassedList(ByVal hWnd As Long, ByVal Msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Dim tItem As DRAWITEMSTRUCT
Dim sBuff As String * 255
Dim sItem As String
Dim lBack As Long
If Msg = WM_DRAWITEM Then '绘制菜单消息
Call CopyMemory(tItem, ByVal lParam, Len(tItem))
If tItem.CtlType = ODT_LISTBOX Then '只处理控件类型为listbox的控件
Call SendMessage(tItem.hwndItem, LB_GETTEXT, tItem.itemID, ByVal sBuff) '获得具体值
sItem = Left(sBuff, InStr(sBuff, Chr(0)) - 1)
If (tItem.itemState And ODS_FOCUS) Then '判断某项是否具有焦点
lBack = CreateSolidBrush(GetSysColor(COLOR_HIGHLIGHT))
Call FillRect(tItem.hdc, tItem.rcItem, lBack)
Call SetBkColor(tItem.hdc, GetSysColor(COLOR_HIGHLIGHT))
Call SetTextColor(tItem.hdc, GetSysColor(COLOR_HIGHLIGHTTEXT))
TextOut tItem.hdc, tItem.rcItem.Left, tItem.rcItem.Top, ByVal sItem, Len(sItem)
DrawFocusRect tItem.hdc, tItem.rcItem
Else '如果没有焦点,则
lBack = CreateSolidBrush(GetSysColor(COLOR_WINDOW))
Call FillRect(tItem.hdc, tItem.rcItem, lBack)
Call SetBkColor(tItem.hdc, GetSysColor(COLOR_WINDOW))
Call SetTextColor(tItem.hdc, tItem.itemData)
TextOut tItem.hdc, tItem.rcItem.Left, tItem.rcItem.Top, ByVal sItem, Len(sItem)
End If
Call DeleteObject(lBack)
SubClassedList = 0
Exit Function
End If
End If
SubClassedList = CallWindowProc(lPrevWndProc, hWnd, Msg, wParam, lParam)
End Function
Public Sub SubLists(ByVal hWnd As Long)
lPrevWndProc = SetWindowLong(hWnd, GWL_WNDPROC, AddressOf SubClassedList)
End Sub
Public Sub RemoveSubLists(ByVal hWnd As Long)
Call SetWindowLong(hWnd, GWL_WNDPROC, lPrevWndProc)
End Sub
窗体中 :
Private Sub Form_Load()
Dim I As Integer
For I = 0 To 15
List1.AddItem "Color " & I
List2.AddItem "FDSF"
Next
SubLists hWnd
End Sub
Private Sub Form_Unload(Cancel As Integer)
RemoveSubLists hWnd
End Sub