// Get width of preceding substring
WM_Render_GetTextDims(NULL, item->Label, item->KeyOffset, &item->UnderlineX, NULL);
// Get the width of the underlined character
// Get width of preceding substring
WM_Render_GetTextDims(NULL, item->Label, item->KeyOffset, &item->UnderlineX, NULL);
// Get the width of the underlined character