57.txt

来自「VB文章集（含API、窗口、数据库、多媒体、系统、文件、等等）」· 文本 代码 · 共 38 行

使用API获取颜色 
     除了使用CommonDialog的方法，还有一种使用API函数的方法进可以实现获取颜色。 参见本例：
>>步骤1----建立新工程，在窗体上放置一个CommandButton,一个PictureBox,一个TextBox；
>>步骤2----编写如下代码：

private Declare Function ChooseColor Lib "comdlg32.dll" Alias _
    "ChooseColorA" (pChoosecolor As ChooseColor) As Long

private Type ChooseColor
    lStructSize As Long
    hwndOwner As Long
    hInstance As Long
    rgbResult As Long
    lpCustColors As String
    flags As Long
    lCustData As Long
    lpfnHook As Long
    lpTemplateName As String
End Type

Private Sub Command1_Click()
    Dim cc As ChooseColor

    cc.lStructSize = Len(cc)
    cc.hwndOwner = Me.hWnd
    cc.hInstance = App.hInstance
    cc.flags = 0
    cc.lpCustColors = String$(16 * 4, 0)

    if ChooseColor(cc) >= 1 Then
        Picture1.BackColor = cc.rgbResult
        Text1.Text = "颜色值：" & cc.rgbResult
    Else
        Text1.Text = "你取消了。"
    End If
End Sub

>>步骤3----编译运行,看,出来了吧.