VB6.0 【GDI+ 画直线】_vb6.0 initgdiplus

‘窗口代码
Option Explicit
Dim m_graphics As Long '设备场景的句柄
Dim m_Pen As Long '画笔
Private Sub Form_Load()
    InitGDIPlus '初始化
    GdipCreateFromHDC Me.hDC, m_graphics '创建自DC图形
    GdipCreatePen1 ChangeColor(255), 1, UnitPixel, m_Pen '创建画笔
    GdipDrawLineI m_graphics, m_Pen, 20, 100, 560, 100 '画直线I
End Sub
 
Private Sub Form_Unload(Cancel As Integer)
    GdipDeletePen m_Pen '删除画笔
    GdipDeleteGraphics m_graphics '释放内存
    TerminateGDIPlus  'Gdiplus关闭
End Sub

'模块代码
Option Explicit
    Dim m_token As Long
Public Type GdiplusStartupInput
    GdiplusVersion As Long
    DebugEventCallback As Long
    SuppressBackgroundThread As Long
    SuppressExternalCodecs As Long
End Type
 
Public Enum GpUnit
    UnitWorld
    UnitDisplay
    UnitPixel
    UnitPoint
    UnitInch
    UnitDocument
    UnitMillimeter
End Enum
'-----------------------------------------------------------------------------------------------------------------------
Public Declare Function GdipCreateFromHDC Lib "gdiplus" (ByVal hDC As Long, Graphics As Long) As Long
Public Declare Function GdiplusStartup Lib "gdiplus" (token As Long, inputbuf As GdiplusStartupInput, Optional ByVal outputbuf As Long = 0) As Long
Public Declare Function GdiplusShutdown Lib "gdiplus" (ByVal token As Long) As Long
Public Declare Function GdipDeleteGraphics Lib "gdiplus" (ByVal Graphics As Long) As Long
Public Declare Function GdipCreatePen1 Lib "gdiplus" (ByVal Color As Long, ByVal Width As Single, ByVal unit As GpUnit, pen As Long) As Long
Public Declare Function GdipDrawLineI Lib "gdiplus" (ByVal Graphics As Long, ByVal pen As Long, ByVal x1 As Long, ByVal y1 As Long, ByVal x2 As Long, ByVal y2 As Long) As Long
Public Declare Function GdipDeletePen Lib "gdiplus" (ByVal pen As Long) As Long
Public Function InitGDIPlus()     '初始化GDI+。使用GID+之前必须初始化 返回一个标记，用作关闭
    Dim StartupInput As GdiplusStartupInput
    Dim token As Long
    StartupInput.GdiplusVersion = 1 '版本 默认为1
    GdiplusStartup token, StartupInput, 0
    m_token = token
End Function
 
Public Function TerminateGDIPlus()  'Gdiplus关闭
        GdiplusShutdown m_token
End Function
'RGB颜色转换成ARGB
Public Function ChangeColor(ByVal Color As Long, Optional ByVal Alpha As Long = &HFF000000) As Long
    ChangeColor = Alpha Or ((Color And &HFF0000) \ &H10000) Or (Color And &HFF00&) Or ((Color And &HFF&) * &H10000)
End Function