Thank you for the answer , but I Have always the following error :

An item with the specified TargetId 'btnBold' being added to the QuickAccessToolbar is not registered with the associated XamRibbon.

Here is my code :

RibbonGroup  

RibbonGroup group = new RibbonGroup();

group.caption = "Font";

group.id = "grpfont";

buttonTool btnTool = new ButtonTool();

QatPlaceholderTool btnBoldPH = new QatPlaceholderTool("btnBold"

);

//If you need to add a RibbonGroup to the QAT, you have to set the TargetType to RibbonGroup

QatPlaceholderTool tab1_group1PH = new QatPlaceholderTool("grpFont", QatPlaceholderToolType

.RibbonGroup);

//Replace xamRibbon1 with the instance variable of your xamRibbon

this.xamRibbon1.QuickAccessToolBar.Items.Add(btnBoldPH);

this.xamRibbon1.QuickAccessToolbar.Items.Add(tab1_group1PH);

WHERE IS ERROR ?

thank you CaisseOdev 

Hi Caisse,

Your almost there.  I should have explained how to add the RibbonGroup to the Ribbon itself.

So now that you have your ribbon group you need to add it to a ribbon tab and then you need to add the tab to the ribbon's Tabs collection.  The following bit of code will show you how to do this.

Thank you very much . I Have Understanded , I Forgot add a new tab.

Other Question : how you do  to insert Code in the post for this forum ?

Thank you   CaiseOdeV

thank you