Unable to add custom icon / bitmap to command bar - WinCE 5 API

[MasterWill]

I am able to add system icons to a command bar, but when I try to add my own, I just get a blank button. I have tried several configurations, a bitmap vs. an icon, and it still shows up as blank. Since I was testing with a system icon, that code is commented out.

Here is my button structure:

// File bar button structure
const TBBUTTON tbCBStdBtns[] = 
{
//  BitmapIndex       Command    State       Style       UserData String
//	{STD_FILENEW,     IDC_NEW,   TBSTATE_ENABLED,
//                                         TBSTYLE_BUTTON,    0,   0},
	{IDB_SQUARED16, IDC_SQUAREDSHIPPING, 
								TBSTATE_ENABLED, TBSTYLE_BUTTON,    0,   0}
};

Here is the creation:

case WM_CREATE:
			// Create the command bar
			g_hWndCommandBar = CommandBar_Create(g_hInst, hWnd, IDC_CMDBAR);
			CommandBar_AddBitmap (g_hWndCommandBar, g_hInst, IDB_SQUARED16, 1, 0, 0);
			//CommandBar_AddBitmap (g_hWndCommandBar, HINST_COMMCTRL, IDB_STD_SMALL_COLOR, STD_BMPS, 0, 0);
			CommandBar_AddButtons(g_hWndCommandBar, 1, &tbCBStdBtns);
			//CommandBar_AddButtons(g_hWndCommandBar, 1, &tbCBStdBtns);
            CommandBar_InsertMenubar(g_hWndCommandBar, g_hInst, IDR_MENU, 1);

Note that I want the icon to the left of the menu (originally I wanted the icon on the title bar, but apparently it is not supported in WinCE). I'm pretty new at this, so I apologize in advance if my code inclusion does not follow this website's standards. I will certainly provide the files if necessary.

Thanks in advance!