Probleme Héritage classe .NET

Bonjour, je vous contacte car j'ai un probleme avec une classe qui hérite de la classe DataGridTextBoxColumn, j'ai redéfinie les méthodes paint et dans mon programme lorsque j'utilise cette classe, le fonctionnement prévu par paint ne se fait pas , aurais-je mal fait mon héritage et ma redéfinition. S'il vous plait aidez moi !! Merci

voici ma classe héritée :

using

namespace System;
usingnamespace System::ComponentModel;
usingnamespace System::Drawing;
usingnamespace System::Windows::Forms;

public

__gcclass ColumnStyle : public DataGridTextBoxColumn
{
public : ColumnStyle(PropertyDescriptor *pcol)
{
//
// TODO: Add constructor logic here
//
}

protected : void Abort(int RowNum)
{

}

protected : bool Commit(CurrencyManager *DataSource,int RowNum)
{
returntrue;
}

protected : void Edit(CurrencyManager *Source ,int Rownum,Rectangle *Bounds, bool ReadOnly,String *InstantText, bool CellIsVisible)
{

}

protected : int GetMinimumHeight()
{
//
// return here your minimum height
//
return 16;
}

protected : int GetPreferredHeight(Graphics *g ,Object *Value)
{
//
// return here your preferred height
//
return 16;
}

protected : Size GetPreferredSize(Graphics * g, Object *Value)
{
//
// return here your preferred size
//
Size cellSize;
cellSize.Width=75;
cellSize.Height=16;
return cellSize;
}

protected : void Paint(Graphics * g,Rectangle* Bounds,CurrencyManager *Source,int RowNum)
{
Brush * BackBrush = new SolidBrush(Color::White);
bool bdel = (bool) GetColumnValueAtRow(Source, RowNum);
MessageBox::Show(bdel.ToString());
if(bdel == true)
BackBrush = Brushes::Coral;
else
BackBrush = Brushes::White;
g->FillRectangle(BackBrush, Bounds->X, Bounds->Y, Bounds->Width, Bounds->Height);
System::Drawing::Font * font = new Font(System::Drawing::FontFamily::GenericSansSerif , (float)8.25 );
g->DrawString( bdel.ToString() ,font ,Brushes::Blue ,Bounds->X ,Bounds->Y );
}

protected : void Paint(Graphics *g,Rectangle* Bounds,CurrencyManager* Source,int RowNum,bool AlignToRight)
{
Brush *BackBrush = new SolidBrush(Color::White);
bool bdel = (bool) GetColumnValueAtRow(Source, RowNum);
MessageBox::Show(bdel.ToString());
if(bdel == true)
BackBrush = Brushes::Coral;
else
BackBrush = Brushes::White;
g->FillRectangle(BackBrush, Bounds->X, Bounds->Y, Bounds->Width, Bounds->Height);
System::Drawing::Font *font = new Font(System::Drawing::FontFamily::GenericSansSerif , (float)8.25 );
g->DrawString( bdel.ToString() ,font ,Brushes::Blue ,Bounds->X ,Bounds->Y );
}

protected : void Paint(Graphics * g,Rectangle *Bounds,CurrencyManager *Source,int RowNum, Brush *BackBrush ,Brush* ForeBrush ,bool AlignToRight)
{
bool bdel = (bool) GetColumnValueAtRow(Source, RowNum);
MessageBox::Show(bdel.ToString());
if(bdel == true)
BackBrush = Brushes::Coral;
else
BackBrush = Brushes::White;
g->FillRectangle(BackBrush, Bounds->X, Bounds->Y, Bounds->Width, Bounds->Height);
System::Drawing::Font *font = new Font(System::Drawing::FontFamily::GenericSansSerif , (float)8.25 );
g->DrawString( bdel.ToString() ,font ,Brushes::Blue ,Bounds->X ,Bounds->Y );
}

};

MERCI