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getsyscolor (user32)
 
.
Summary

C# Signature:

[DllImport("user32.dll")]
static extern uint GetSysColor(int nIndex);

VB .NET Signature:

<DllImport("user32.dll")> _
Public Shared Function GetSysColor(ByVal nIndex As Integer) As Integer
' Use nIndex = 1 to get Desktop color
End Function

User-Defined Types:

None.

Notes:

You can also use the COLOR_ constants as the index.

Tips & Tricks:

Here's which color corresponds to what in winuser.h

SystemColors.ScrollBar CTLCOLOR_MSGBOX, COLOR_SCROLLBAR
SystemColors.Desktop CTLCOLOR_EDIT, COLOR_BACKGROUND, COLOR_DESKTOP
SystemColors.ActiveCaption CTLCOLOR_LISTBOX, COLOR_ACTIVECAPTION
SystemColors.InactiveCaption CTLCOLOR_BTN, COLOR_INACTIVECAPTION
SystemColors.Menu CTLCOLOR_DLG, COLOR_MENU
SystemColors.Window CTLCOLOR_SCROLLBAR, COLOR_WINDOW
SystemColors.WindowFrame CTLCOLOR_STATIC, COLOR_WINDOWFRAME
SystemColors.MenuText CTLCOLOR_MAX, COLOR_MENUTEXT
SystemColors.WindowText COLOR_WINDOWTEXT
SystemColors.ActiveCaptionText COLOR_CAPTIONTEXT
SystemColors.ActiveBorder COLOR_ACTIVEBORDER
SystemColors.InactiveBorder COLOR_ACTIVEBORDER
SystemColors.AppWorkspace COLOR_APPWORKSPACE
SystemColors.Highlight COLOR_HIGHLIGHT
SystemColors.HighlightText COLOR_HIGHLIGHTTEXT
SystemColors.ButtonFace COLOR_BTNFACE, COLOR_3DFACE
SystemColors.ControlDark COLOR_BTNSHADOW
SystemColors.GrayText COLOR_GRAYTEXT
SystemColors.ControlText COLOR_BTNTEXT
SystemColors.InactiveCaptionText COLOR_INACTIVECAPTIONTEXT
SystemColors.ControlLightLight COLOR_BTNHIGHLIGHT, COLOR_3DHIGHLIGHT, COLOR_3DHILIGHT, COLOR_BTNHILIGHT
SystemColors.ControlDarkDark COLOR_3DSHADOW, COLOR_3DDKSHADOW
SystemColors.ControlLight COLOR_3DLIGHT
SystemColors.InfoText COLOR_INFOTEXT
SystemColors.Info COLOR_INFOBK
SystemColors.HotTrack COLOR_HOTLIGHT
SystemColors.GradientActiveCaption COLOR_GRADIENTACTIVECAPTION
SystemColors.GradientInactiveCaption COLOR_GRADIENTINACTIVECAPTION
SystemColors.MenuHighlight COLOR_MENUHILIGHT
SystemColors.MenuBar COLOR_MENUBAR

Sample Code:

VB.NET example
'Get the Desktop background color
Dim i as Integer = GetSysColor(1)
'GetSysColor returns in BGR byte order NOT RGB
Dim colorDT as Color = Color.FromARGB(i and &HFF, (i and &HFF00) >> 8, (i and &HFF0000) >> 16)

Alternative Managed API:

VB.NET
Dim colorDT as Color = SystemColors.Desktop
'Any other System color can be returned - See SystemColors class

Documentation
GetSysColor on MSDN

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