NppCSharpPluginPack: how to add toolbar buttons?

ZedZipDev

I am developing plugin with 2 commands
Settings
Format

The plugin is added to the Notepad++ and I see it in the
plugins->
PMF ->
Settings
Format
And click on these menus call the corresponding function. It is ok.
Now I want to add 2 toolbar buttons.
They were added with icons. But no tooltips and click has no reaction. What I do wrong?
Here is my 2 functions
public static void CommandMenuInit()
{
IsCmdMenuInitCalled=true;
int index = 0;
PMFPanelId = index++;
PMFSettingsId = PMFSettingsId;
PluginBase.SetCommand(PMFPanelId = index++, “PMF Format”, ExecuteFormatting);
PluginBase.SetCommand(PMFPanelId = index++, “PMF Settings”, ShowSettingsWindow);

SetToolbarImage(XPoorTSQLFormatter.NPP.Resources.Resource.pmf_format, 1);
SetToolbarImage(XPoorTSQLFormatter.NPP.Resources.Resource.pmf_settings, 2);

}
static public void SetToolbarImage(Bitmap image, int pluginId)
{
var tbIcons = new toolbarIcons();
tbIcons.hToolbarBmp = image.GetHbitmap();
tbIcons.hToolbarIcon = tbIcons.hToolbarBmp; // same icon for light mode
tbIcons.hToolbarIconDarkMode = tbIcons.hToolbarBmp; // same icon for dark mode

 var iz = Marshal.SizeOf(tbIcons);
 var iz2 = Marshal.SizeOf(tbIcons.hToolbarIcon);
// MessageBox.Show($"SetToolbarImage: {pluginId}");

 //MessageBox.Show($"{pluginId}: Size of toolbarIcons struct: {iz2} bytes");

 IntPtr pTbIcons = Marshal.AllocHGlobal(iz);
 Marshal.StructureToPtr(tbIcons, pTbIcons, false);

 Win32.SendMessage(
     PluginBase.nppData._nppHandle,
     (uint)NppMsg.NPPM_ADDTOOLBARICON,
     (IntPtr)PluginBase._funcItems.Items[pluginId-1]._cmdID, 
     pTbIcons);

 Marshal.FreeHGlobal(pTbIcons);

}