怎样使VB窗口透明而控件不透明
我希望程序的窗口中除控件外其他部分都透明，请问这个怎样实现啊？
我试过用SetLayeredWindowAttributes 这个API函数使窗口透明，但是控件都看不见了。
或者我在窗口中用API函数画了个图，怎样使图画以外的部分都透明啊，即只显示图画部分。
知道的朋友帮帮忙，谢了。
[解决办法]
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 Declare Function SetLayeredWindowAttributes Lib "user32" (ByVal hwnd As Long, ByVal crKey As Long, ByVal bAlpha As Byte, ByVal dwFlags As Long) As Long
Private Const WS_EX_LAYERED = &H80000
Private Const GWL_EXSTYLE = (-20)
Private Const LWA_ALPHA = &H2
Private Const LWA_COLORKEY = &H1
Private Sub Form_Load()
Me.BackColor = vbBlue
Dim rtn As Long
rtn = GetWindowLong(hwnd, GWL_EXSTYLE)
rtn = rtn Or WS_EX_LAYERED
SetWindowLong hwnd, GWL_EXSTYLE, rtn
SetLayeredWindowAttributes hwnd, vbBlue, 0, LWA_COLORKEY
End Sub
