桌面上的图标文字改成透明

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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函数回复默认的图标文字颜色和背景
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

'通过三步查找到放置桌面图表的窗口
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

'设置图标文字的颜色
SendMessage hWindow, LVM_SETTEXTCOLOR, 0, clFore

'重新绘制所有的图标
lItemCount = SendMessage(hWindow, LVM_GETITEMCOUNT, 0, 0)
SendMessage hWindow, LVM_REDRAWITEMS, 0, lItemCount - 1
'更新窗口
UpdateWindow hWindow
End Sub

Sub ArrangeDesktopIcon(iWidth As Integer, iHeight As Integer)
Dim hWindow As Long
Dim i1, i2, i, iCount As Integer
Dim po As POINTAPI

'通过三步查找到放置桌面图表的窗口
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
'发送LVM_SETITEMPOSITION消息排列图标
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()
'设置图标文字的颜色为蓝色，背景色为黑色，背景为透明
SetIconText vbBlue, vbBlack, True
End Sub

Private Sub Command2_Click()
RestoreColor
End Sub

Private Sub Command3_Click()
'以100x100像素为单位排列图标
ArrangeDesktopIcon 100, 100
End Sub

Private Sub Form_Load()
Command1.Caption = "设置文字背景"
Command2.Caption = "恢复文字背景"
Command3.Caption = "排列桌面图标"
End Sub
运行程序，点击Command1，可以看到桌面图标的文本景色变成了蓝色，如果你设置了桌面图片，还可以看到文字
的背景变成了透明的而不是在下面有一个难看的色块，点击Command2可以恢复Windows的默认设置，点击Command3可以
使你的桌面图标以横排的方式排列，不过前提是要将桌面图标的自动排列属性设置为False。
以上程序在VB6,Windows98,Windows2000下运行通过。

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