internal RECT rcMargins = RECT.FromXYWH(-1, -1, -1, -1);

    SystemSizingMargins  = 0x0200

    SystemSizingMargins = &H200

   PSD_DEFAULTMINMARGINS =        0x00000000, // default (printer's)

   PSD_MINMARGINS =           0x00000001, // use caller's

   PSD_MARGINS =              0x00000002, // use caller's

   PSD_DISABLEMARGINS =           0x00000010,

public struct MARGINS

Public Structure MARGINS

static extern int DwmExtendFrameIntoClientArea(IntPtr hwnd, ref MARGINS margins);

Private Shared Function DwmExtendFrameIntoClientArea(ByVal hwnd As IntPtr, ByRef margins As MARGINS) As Integer

MARGINS

static extern int GetThemeMargins(IntPtr hTheme, IntPtr hdc, int iPartId, int iStateId, int iPropId, IntPtr prc, out MARGINS pMargins);

Declare Function GetThemeMargins Lib "uxtheme.dll" (TODO) As TODO

Public Shared Function GetThemeMargins(hTheme As IntPtr, hdc As IntPtr, iPartId As Integer, iStateId As Integer, iPropId As Integer, ByRef pMargins As MARGINS) As Int32

MARGINS