/// <summary>
/// Sets the font only for the selected part of the rich text box
/// without modifying the other properties like size or style
/// </summary>
/// <param name="face">Name of the font to use</param>
/// <returns>true on success, false on failure</returns>
public static bool SetSelectionFont(RichTextBox control, string face)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.szFaceName = new char[32];
cf.dwMask = CFM_FACE;
face.CopyTo(0, cf.szFaceName, 0, Math.Min(31, face.Length));
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
Marshal.StructureToPtr(cf, lParam, false);
int res = SendMessage(control.Handle, EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return (res == 0);
}
/// <summary>
/// Set the style only for the selected part of the rich text box
/// with the possibility to mask out some styles that are not to be modified
/// </summary>
/// <param name="mask">modify which styles?</param>
/// <param name="effect">new values for the styles</param>
/// <returns>true on success, false on failure</returns>
private bool SetSelectionStyle(UInt32 mask, UInt32 effect)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.dwMask = mask;
cf.dwEffects = effect;
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
Marshal.StructureToPtr(cf, lParam, false);
int res = SendMessage(control.Handle, EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return(res == 0);
}
/// <summary>
/// Sets the font only for the selected part of the rich text box
/// without modifying the other properties like size or style
/// </summary>
/// <param name="face">Name of the font to use</param>
/// <returns>true on success, false on failure</returns>
public bool SetSelectionFont(string face)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.szFaceName = new char[32];
cf.dwMask = CFM_FACE;
face.CopyTo(0, cf.szFaceName, 0, Math.Min(31, face.Length));
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
//Marshal.StructureToPtr(cf, lParam, false);
int res = SendMessage(Handle, EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return(res == 0);
}
/// <summary>
/// Sets the font size only for the selected part of the rich text box
/// without modifying the other properties like font or style
/// </summary>
/// <param name="size">new point size to use</param>
/// <returns>true on success, false on failure</returns>
public static bool SetSelectionSize(RichTextBox control, int size)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.dwMask = CFM_SIZE;
// yHeight is in 1/20 pt
cf.yHeight = size * 20;
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
Marshal.StructureToPtr(cf, lParam, false);
int res = SendMessage(control.Handle, EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return(res == 0);
}
public bool SetSelectionSize(int size)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.dwMask = CFM_SIZE;
cf.yHeight = size * 20;
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
Marshal.StructureToPtr(cf, lParam, false);
int res = Win32.SendMessage(Handle, (int)Win32.Msg.EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return(res == 0);
}
private static extern int SendMessage(HandleRef hWnd,
int msg,
int wParam,
ref CHARFORMATSTRUCT lp);
/// <summary>
/// Sets the font size only for the selected part of the rich text box
/// without modifying the other properties like font or style
/// </summary>
/// <param name="size">new point size to use</param>
/// <returns>true on success, false on failure</returns>
public static bool SetSelectionSize(RichTextBox control, int size)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.dwMask = CFM_SIZE;
// yHeight is in 1/20 pt
cf.yHeight = size * 20;
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
Marshal.StructureToPtr(cf, lParam, false);
int res = SendMessage(control.Handle, EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return (res == 0);
}
/// <summary>
/// Set the style only for the selected part of the rich text box
/// with the possibility to mask out some styles that are not to be modified
/// </summary>
/// <param name="mask">modify which styles?</param>
/// <param name="effect">new values for the styles</param>
/// <returns>true on success, false on failure</returns>
private bool SetSelectionStyle(UInt32 mask, UInt32 effect)
{
CHARFORMATSTRUCT cf = new CHARFORMATSTRUCT();
cf.cbSize = Marshal.SizeOf(cf);
cf.dwMask = mask;
cf.dwEffects = effect;
IntPtr lParam = Marshal.AllocCoTaskMem(Marshal.SizeOf(cf));
Marshal.StructureToPtr(cf, lParam, false);
int res = SendMessage(control.Handle, EM_SETCHARFORMAT, SCF_SELECTION, lParam);
return (res == 0);
}
