private static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref CharFormat2 lParem);
private static extern IntPtr SendMessageNative(IntPtr hwnd, int msg, IntPtr wParam, ref CharFormat2 lParam);
public static extern bool SendMessage(IntPtr hWnd, int Msg, int wParam, ref CharFormat2 lParam);
public void ClearBackColor(bool clearAll)
{
//LockWindowUpdate(HWND);
this.SuspendRefresh();
this.SuspendScroll();
this.SuspendLayout();
int ScrollPosVert = this.HorizontalScrollPos;
int ScrollPosHoriz = this.VerticalScrollPos;
int selStart = this.SelectionStart;
int selLength = this.SelectionLength;
try
{
IntPtr HWND = this.Handle;
if (clearAll) this.SelectAll();
CharFormat2 format = new CharFormat2();
format.crBackColor = -1;
format.dwMask = CFM_BACKCOLOR;
format.dwEffects = CFE_AUTOBACKCOLOR;
format.cbSize = Marshal.SizeOf(format);
SendMessage(HWND, EM_SETCHARFORMAT, SCF_SELECTION, ref format);
}
finally
{
// Return the previous values...
this.SelectionStart = selStart;
this.SelectionLength = selLength;
this.HorizontalScrollPos = ScrollPosHoriz;
this.VerticalScrollPos = ScrollPosVert;
this.ResumeLayout();
//LockWindowUpdate(IntPtr.Zero);
this.ResumeRefresh();
this.ResumeScroll();
}
}
#pragma warning restore CA1838 // Avoid 'StringBuilder' parameters for P/Invokes
public static IntPtr SendMessage(IntPtr hwnd, int msg, IntPtr wParam, ref CharFormat2 lParam)
{
return(SendMessageNative(hwnd, msg, wParam, ref lParam));
}
protected static extern bool SendMessage(IntPtr hWnd, int msg, int wParam, ref CharFormat2 lParam);
private static extern int SendMessage(IntPtr hWnd, int msg, int wParam, ref CharFormat2 lParem);
public extern static bool SendMessage(IntPtr hWnd, int Msg, int wParam, ref CharFormat2 lParam);
public static extern IntPtr SendMessage(IntPtr window, int msg, int wParam, ref CharFormat2 lParam);
public void ClearBackColor([Optional, DefaultParameterValue(true)] bool ClearAll)
{
CharFormat2 Format;
IntPtr HWND = this.Handle;
LockWindowUpdate(this.Handle);
this.SuspendLayout();
int ScrollPosVert = this.GetScrollBarPos(this.Handle, ScrollBarTypes.SB_VERT);
int ScrollPosHoriz = this.GetScrollBarPos(this.Handle, ScrollBarTypes.SB_HORZ);
int SelStart = this.SelectionStart;
int SelLength = this.SelectionLength;
if (ClearAll)
{
this.SelectAll();
}
Format = new CharFormat2();
Format.crBackColor = -1;
Format.crTextColor = -1;
Format.dwMask = 0x4000000;
Format.dwEffects = 0x4000000;
Format.cbSize = Marshal.SizeOf(Format);
SendMessage(this.Handle, 0x444, 1, ref Format);
this.SelectionStart = SelStart;
this.SelectionLength = SelLength;
SendMessage(this.Handle, 0x4de, 0, new POINT(ScrollPosHoriz, ScrollPosVert));
this.ResumeLayout();
LockWindowUpdate(IntPtr.Zero);
}
