这什么SetPixel 完全没效果
这什么SetPixel 完全没效果

VB code

Private Declare Function SetPixel Lib "gdi32 " (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As Long) As LongPrivate Sub Form_Load()   SetPixel Me.hdc, 40, 40, &HFF   MsgBox ""End Sub

[解决办法]
AutoRedraw属性设置为True
或者在Form_Paint事件中使用SetPixel Me.hdc, 40, 40, &HFF（对应于AutoRedraw属性为false才有Paint事件）

[解决办法]
不能放到Load中

VB code

Private Declare Function SetPixel Lib "gdi32 " (ByVal hdc As Long, ByVal x As Long, ByVal y As Long, ByVal crColor As Long) As LongPrivate Sub Form_Click()    SetPixel Me.hdc, 40, 40, &HFF    Me.Refresh    MsgBox ""End SubPrivate Sub Form_Load()    Me.AutoRedraw = True    Me.ScaleMode = vbPixelsEnd Sub