我已经让我的一些用户窗体不再显示标题栏。以下是我必须添加的代码：
Option Explicit
#If VBA7 Then
Public Declare PtrSafe Function FindWindow Lib "user32" _
Alias "FindWindowA" _
(ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Public Declare PtrSafe Function GetWindowLong Lib "user32" _
Alias "GetWindowLongA" _
(ByVal hWnd As Long, _
ByVal nIndex As Long) As Long
Public Declare PtrSafe Function SetWindowLong Lib "user32" _
Alias "SetWindowLongA" _
(ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long
Public Declare PtrSafe Function DrawMenuBar Lib "user32" _
(ByVal hWnd As Long) As Long
Public Declare PtrSafe Function SetLayeredWindowAttributes Lib "user32" ( _
ByVal hWnd As Long, _
ByVal crKey As Long, _
ByVal bAlpha As Byte, _
ByVal dwFlags As Long) As Long
#Else
Public Declare Function FindWindow Lib "user32" _
Alias "FindWindowA" _
(ByVal lpClassName As String, _
ByVal lpWindowName As String) As Long
Public Declare Function GetWindowLong Lib "user32" _
Alias "GetWindowLongA" _
(ByVal hWnd As Long, _
ByVal nIndex As Long) As Long
Public Declare Function SetWindowLong Lib "user32" _
Alias "SetWindowLongA" _
(ByVal hWnd As Long, _
ByVal nIndex As Long, _
ByVal dwNewLong As Long) As Long
Public Declare Function DrawMenuBar Lib "user32" _
(ByVal hWnd As Long) As Long
Public Declare Function SetLayeredWindowAttributes Lib "user32" ( _
ByVal hWnd As Long, _
ByVal crKey As Long, _
ByVal bAlpha As Byte, _
ByVal dwFlags As Long) As Long
#End If
Sub HideBar(frm As Object)
Dim Style As Long, Menu As Long, hWndForm As Long
hWndForm = FindWindow("ThunderDFrame", frm.Caption)
Style = GetWindowLong(hWndForm, &HFFF0)
Style = Style And Not &HC00000
SetWindowLong hWndForm, &HFFF0, Style
DrawMenuBar hWndForm
End Sub
我承认我不理解其中90%的功能，但它却能正常工作。现在我想添加一个选项，使用户界面的背景透明。有人知道我的现有代码和我要添加的代码之间是否会有任何冲突吗？
Declare Function SetLayeredWindowAttributes Lib "user32" ( _
ByVal hWnd As Long, _
ByVal crKey As Long, _
ByVal bAlpha As Byte, _
ByVal dwFlags As Long) As Long
'Constants for title bar
Private Const GWL_STYLE As Long = (-16) 'The offset of a window's style
Private Const GWL_EXSTYLE As Long = (-20) 'The offset of a window's extended style
Private Const WS_CAPTION As Long = &HC00000 'Style to add a titlebar
Private Const WS_EX_DLGMODALFRAME As Long = &H1 'Controls if the window has an icon
'Constants for transparency
Private Const WS_EX_LAYERED = &H80000
Private Const LWA_COLORKEY = &H1 'Chroma key for fading a certain color on your Form
Private Const LWA_ALPHA = &H2 'Only needed if you want to fade the entire userform
Private Sub UserForm_Activate()
HideTitleBarAndBorder Me 'hide the titlebar and border
MakeUserFormTransparent Me 'make certain color transparent
End Sub
Sub MakeUserFormTransparent(frm As Object, Optional Color As Variant)
'set transparencies on userform
Dim formhandle As Long
Dim bytOpacity As Byte
formhandle = FindWindow(vbNullString, Me.Caption)
If IsMissing(Color) Then Color = vbWhite 'default to vbwhite
bytOpacity = 100 ' variable keeping opacity setting
SetWindowLong formhandle, GWL_EXSTYLE, GetWindowLong(formhandle, GWL_EXSTYLE) Or WS_EX_LAYERED
'The following line makes only a certain color transparent so the
' background of the form and any object whose BackColor you've set to match
' vbColor (default vbWhite) will be transparent.
Me.BackColor = Color
SetLayeredWindowAttributes formhandle, Color, bytOpacity, LWA_COLORKEY
End Sub