Professional User Interface Suite, Copyright FOSS Software Inc. Help Published with Permission.

Unfortunately the Visual Studio IDE does not allow you to edit toolbar resources with more than 16 colors. But you can always edit the resource file and bitmap manually. Here is how to remove the first button from the IDR_MAINFRAME toolbar (command ID_FILE_NEW, project DrawCli):

Open the bitmap file (TOOLBAR_1_16bit.bmp) in an external image editor (e.g. Microsoft Paint), remove the first icon and move all other icons to the left. Save the file.

Open the project resource file (DRAWCLI.rc) in an external text editor (e.g. Microsoft NotePad), find the IDR_MAINFRAME TOOLBAR section and remove the row with command ID_FILE_NEW. The section should now look like:

IDR_MAINFRAME TOOLBAR MOVEABLE PURE  16, 15
BEGIN
BUTTON    ID_FILE_OPEN
BUTTON    ID_FILE_SAVE
SEPARATOR
BUTTON    ID_EDIT_CUT
BUTTON    ID_EDIT_COPY
BUTTON    ID_EDIT_PASTE
SEPARATOR
BUTTON    ID_DRAW_SELECT
BUTTON    ID_DRAW_LINE

Save the file.