vb6 – 表单上的黄色对象显示点击透明度

我有一个问题,黄色对象在我的应用程序中的多个vb6表单上“点击”：

我可以想到的唯一可能影响它的是以下(从VBForums开始,我用来使青色元素透明,就像你在图像中看到的那样,但是这对vbYellow没有任何影响.

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 GWL_STYLE = (-16)
Private Const GWL_EXSTYLE = (-20)
Private Const WS_EX_LAYERED = &H80000
Private Const LWA_COLORKEY = &H1
Private Const LWA_ALPHA = &H2

Private Sub Form_Load()
Me.BackColor = vbCyan
SetWindowLong Me.hwnd, GWL_EXSTYLE, GetWindowLong(Me.hwnd, GWL_EXSTYLE) Or WS_EX_LAYERED
SetLayeredWindowAttributes Me.hwnd, vbCyan, 0&, LWA_COLORKEY
End Sub

我试图用相同颜色的图像替换vbYellow形状.这也有点击功能,但最终会得到相同的结果,甚至不会触发任何设置的点击功能.

我认为问题在于VB6 / Win32有时会使用不同的颜色代码.有时只需从#RRGGBB(RGB)切换到#BBGGRR(BGR).

选择黄色的好颜色是洋红色,#FF00FF,因为无论是否切换红色和蓝色成分,此颜色都会起作用.

然后可以直接使用vbMagenta而不会出现问题.