Private Const GWL_STYLE = (-16)             '窗口样式

'窗口风格
Private Const WS_CAPTION = &HC00000         '带标题栏的窗口
Private Const WS_MAXIMIZEBOX = &H10000      '带最大化按钮的窗口
Private Const WS_MINIMIZEBOX = &H20000      '带最小化按钮的窗口
Private Const WS_SYSMENU = &H80000          '带系统菜单的窗口
Private Const WS_CLIPSIBLINGS = &H4000000   '不重绘层叠子窗口
Private Const WS_CLIPCHILDREN = &H2000000   '绘图时排子窗口区域
Private Const WS_OVERLAPPED = &H0&          '具有标题栏和边框的层叠窗口
Private Const WS_THICKFRAME = &H40000       '具有可调边框
'WS_OVERLAPPEDWINDOW具有标题栏、窗口菜单、可调边框和最大化、最小化按钮的窗口
Private Const WS_OVERLAPPEDWINDOW = (WS_OVERLAPPED Or WS_CAPTION Or WS_SYSMENU Or WS_THICKFRAME Or WS_MINIMIZEBOX Or WS_MAXIMIZEBOX)
Private Const WS_GROUP = &H20000            '指定一组控制的第一个控制
Private Const WS_POPUP = &H80000000         '弹出式窗口
Private Const WS_BORDER = &H800000          '单边框窗口
Private Const WS_POPUPWINDOW = (WS_POPUP Or WS_BORDER Or WS_SYSMENU) '具有单边框、标题栏菜单的弹出式窗口
Private Const WS_MINIMIZE = &H20000000      '窗口最小化
Private Const WS_VISIBLE = &H10000000       '窗口可见
Private Const WS_DISABLED = &H8000000       '窗口被禁用
Private Const WS_MAXIMIZE = &H1000000       '窗口最大化
Private Const WS_DLGFRAME = &H400000        '对话框边框风格
Private Const WS_VSCROLL = &H200000         '具有垂直滚动条
Private Const WS_HSCROLL = &H100000         '具有水平滚动条
Private Const WS_TABSTOP = &H10000          '具有TAB键控制
Private Const WS_CHILD = &H40000000
Private Const WS_CHILDWINDOW = (WS_CHILD)   '具有子窗口

'扩展风格
Private Const WS_EX_WINDOWEDGE = &H100&         '窗口具有凸起的3D边框
Private Const WS_EX_CLIENTEDGE = &H200&         '窗口具有阴影边界
Private Const WS_EX_TOOLWINDOW = &H80&          '小标题工具窗口
Private Const WS_EX_TOPMOST = &H8&              '窗口总在顶层
Private Const WS_EX_OVERLAPPEDWINDOW = (WS_EX_WINDOWEDGE Or WS_EX_CLIENTEDGE) 'WS_EX-CLIENTEDGE和WS_EX_WINDOWEDGE的组合
Private Const WS_EX_PALETTEWINDOW = (WS_EX_WINDOWEDGE Or WS_EX_TOOLWINDOW Or WS_EX_TOPMOST) 'WS_EX_WINDOWEDGE和WS_EX_TOOLWINDOW和WS_EX_TOPMOST的组合
Private Const WS_EX_DLGMODALFRAME = &H1&        '带双边的窗口
Private Const WS_EX_NOPARENTNOTIFY = &H4&       '窗口在创建和销毁时不向父窗口发送WM_PARENTNOTIFY消息
Private Const WS_EX_TRANSPARENT = &H20&         '窗口透眀
Private Const WS_EX_MDICHILD = &H40&            'MDI子窗口
Private Const WS_EX_CONTEXTHELP = &H400&        '标题栏包含问号联机帮助按钮
Private Const WS_EX_RIGHT = &H1000&             '窗口具有右对齐属性
Private Const WS_EX_RTLREADING = &H2000&        '窗口文本自右向左显示
Private Const WS_EX_LEFTSCROLLBAR = &H4000&     '标题栏在客户区的左边
Private Const WS_EX_CONTROLPARENT = &H10000     '允许用户使用Tab键在窗口的子窗口间搜索
Private Const WS_EX_STATICEDGE = &H20000        '为不接受用户输入的项创建一个三维边界风格
Private Const WS_EX_APPWINDOW = &H40000         '在任务栏上显示顶层窗口的标题按钮
Private Const WS_EX_LAYERED = &H80000           '窗口具有透眀属性(Win2000)以上
Private Const WS_EX_NOINHERITLAYOUT = &H100000 '窗口布局不传递给子窗口(Win2000)以上
Private Const WS_EX_LAYOUTRTL = &H400000        '水平起点在右边的窗口
Private Const WS_EX_NOACTIVATE = &H8000000      '窗口不会变成前台窗口(Win2000)以上
Private Const WS_EX_LEFT = &H0&                 '窗口具有左对齐属性
Private Const WS_EX_LTRREADING = &H0&           '窗口文本自左向右显示
Private Const WS_EX_RIGHTSCROLLBAR = &H0&       '垂直滚动条在窗口的右边界
Private Const WS_EX_ACCEPTFILES = &H10&         '接受文件拖曳
Private Const WS_EX_COMPOSITED = &H2000000      '窗体所有子窗口使用双缓冲从低到高绘制(XP)

Private Sub Command1_Click()
    OrStyle
End Sub

Private Sub OrStyle()

Dim lStyle As Long

lStyle = GetWindowLong(Me.hwnd, GWL_STYLE)    '获取原风格

'lStyle = lStyle And Not WS_OVERLAPPEDWINDOW

'    lStyle = lStyle And Not WS_OVERLAPPED         '去除不用的风格
'    lStyle = lStyle And Not WS_THICKFRAME
'    lStyle = lStyle And Not WS_MAXIMIZEBOX

lStyle = lStyle Or WS_SYSMENU                 '加上自定义风格
    lStyle = lStyle Or WS_GROUP
    lStyle = lStyle Or WS_MINIMIZEBOX

SetWindowLong p.hwnd, GWL_STYLE, lStyle      '设置新的风格

Me.Move (Screen.Width - Me.Width) / 2, (Screen.Height - Me.Height) / 2
    p.Refresh
End Sub