利用VB完全控制你的桌面圖標(biāo) Windows中的桌面圖標(biāo)的排列方式是否讓你感到厭倦而想按照自己的想法排列圖標(biāo)。是否想改變桌面圖標(biāo)文字的背景而不使在圖標(biāo)文字下出現(xiàn)一個個難看的色塊。這里我要介紹如何通過VB來對桌面的圖標(biāo)進(jìn)行徹底的改變。

 其實(shí)在Windows下的桌面以及任務(wù)欄等都是窗口對象，我們可以利用Windows API函數(shù)FindWindow和FindWindowEx來獲得它們的句柄，然后再調(diào)用其它相應(yīng)的API函數(shù)來控制它們。而放置桌面圖標(biāo)的窗口是一個ListView對象，利用SendMessage函數(shù)向該窗口發(fā)送相應(yīng)的消息，就可以對圖標(biāo)進(jìn)行修改了。下面是具體的程序?qū)崿F(xiàn)。

首先在VB中建立一個新的工程，在Form1中加入三個CommandButton控件，然后在Form1的代碼窗口中加入以下代碼：

Option Explicit
Private Type POINTAPI x As Long, y As Long
End Type
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _ (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" _ (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, _ ByVal lpsz2 As String) As Long
Private Declare Function UpdateWindow Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal _ hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) _ As Long
Private Declare Function SendMessageP Lib "user32" Alias "SendMessageA" (ByVal _ hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) _ As Long
Private Declare Function GetSysColor Lib "user32" (ByVal nIndex As Long) As Long
Private Declare Function SetSysColors Lib "user32" (ByVal nChanges As Long, _ lpSysColor As Long, lpColorValues As Long) As Long
Const LVM_FIRST = &H1000
Const LVM_GETITEMCOUNT = LVM_FIRST + 4
Const LVM_SETTEXTCOLOR = LVM_FIRST + 36
Const LVM_REDRAWITEMS = LVM_FIRST + 21
Const LVM_SETTEXTBKCOLOR = LVM_FIRST + 38
Const LVM_SETITEMPOSITION = LVM_FIRST + 15
Const COLOR_DESKTOP = 1'RestoreColor函數(shù)回復(fù)默認(rèn)的圖標(biāo)文字顏色和背景

Sub RestoreColor()
  Dim lColor As Long
  lColor = GetSysColor(COLOR_DESKTOP)
  SetSysColors 1, COLOR_DESKTOP, lColor
End Sub

Sub SetIconText(clFore, clBack As Long, bTrans As Boolean)
Dim hWindow As Long
Dim lItemCount As Long '通過三步查找到放置桌面圖表的窗口
hWindow = FindWindow("Progman", "Program Manager")
hWindow = FindWindowEx(hWindow, 0, "SHELLDLL_DefView", "")
hWindow = FindWindowEx(hWindow, 0, "SysListView32", "")
If bTrans Then '透明背景
  SendMessage hWindow, LVM_SETTEXTBKCOLOR, 0, &HFFFFFFFF
Else '非透明背景
  SendMessage hWindow, LVM_SETTEXTBKCOLOR, 0, clBack
End If
 
'設(shè)置圖標(biāo)文字的顏色
SendMessage hWindow, LVM_SETTEXTCOLOR, 0, clFore '重新繪制所有的圖標(biāo)
lItemCount = SendMessage(hWindow, LVM_GETITEMCOUNT, 0, 0)
SendMessage hWindow, LVM_REDRAWITEMS, 0, lItemCount - 1
 '更新窗口
UpdateWindow hWindowEnd SubSub ArrangeDesktopIcon(iWidth As Integer, iHeight As Integer)
Dim hWindow As Long Dim i1, i2, i, iCount As Integer
Dim po As POINTAPI
'通過三步查找到放置桌面圖表的窗口
hWindow = FindWindow("Progman", "Program Manager")
hWindow = FindWindowEx(hWindow, 0, "SHELLDLL_DefView", "")
hWindow = FindWindowEx(hWindow, 0, "SysListView32", "")
i1 = 20: i2 = 20
iCount = SendMessage(hWindow, LVM_GETITEMCOUNT, 0, 0)
For i = 0 To iCount - 1
po.x = i1: po.y = i2
'發(fā)送LVM_SETITEMPOSITION消息排列圖標(biāo)
Call SendMessage(hWindow, LVM_SETITEMPOSITION, i, i2 * 65536 + i1)
i1 = i1 + iWidth
If i1 > ((Screen.Width / 15) - 32) Then
i1 = 20
i2 = i2 + iHeight
End If
Next i
SendMessage hWindow, LVM_REDRAWITEMS, 0, iCount - 1
'更新窗口
UpdateWindow hWindow
End Sub

Private Sub Command1_Click()
 '設(shè)置圖標(biāo)文字的顏色為藍(lán)色，背景色為黑色，背景為透明
SetIconText vbBlue, vbBlack, True
End
SubPrivate Sub Command2_Click()
RestoreColor
End Sub
Private Sub Command3_Click()
'以100x100像素為單位排列圖標(biāo)
ArrangeDesktopIcon 100, 100
End Sub
Private Sub Form_Load()
Command1.Caption = "設(shè)置文字背景"
Command2.Caption = "恢復(fù)文字背景"
Command3.Caption = "排列桌面圖標(biāo)"
End Sub

運(yùn)行程序，點(diǎn)擊Command1，可以看到桌面圖標(biāo)的文本景色變成了藍(lán)色，如果你設(shè)置了桌面圖片，還可以看到文字的背景變成了透明的而不是在下面有一個難看的色塊，點(diǎn)擊Command2可以恢復(fù)Windows的默認(rèn)設(shè)置，點(diǎn)擊Command3可以使你的桌面圖標(biāo)以橫排的方式排列，不過前提是要將桌面圖標(biāo)的自動排列屬性設(shè)置為False。 以上程序在VB6,Windows98,Windows2000下運(yùn)行通過。