在任务栏中显示无边框窗体的图标

当你将窗体的BorderStyle和ShowInTaskbar这两个属性分别设为True时，你会发现
在任务栏中只显示了该窗体的Caption属性，而窗体的图标则没有显示出来。同时，
如果你用鼠标右键在任务栏中单击该窗体，原本就显示的系统菜单，现在也没有了。
要解决这个问题，你需要用到下面两个API函数。GetWindowLong和SetWindowLong.
下面是程序示例：

将下面的代码放入窗体的声明段中：

Private Declare Function GetWindowLong Lib "user32" Alias "
GetWindowLongA" (ByVal hWnd As Long, ByVal nIndex As Long) 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 Const GWL_STYLE = (-16)
Private Const WS_SYSMENU = &H80000

然后将下面的代码放入窗体的Load事件中：

Dim lStyle As Long

lStyle = GetWindowLong(hWnd, GWL_STYLE) Or _ WS_SYSMENU

SetWindowLong hWnd, GWL_STYLE, lStyle