public static extern int nk_button_image_label_styled( nk_context *ctx, nk_style_button *bstyle, nk_image img, byte *s, uint text_alignment_nkflags );
public static extern int nk_button_symbol_label_styled( nk_context *ctx, nk_style_button *bstyle, nk_symbol_type stype, byte *title, uint align_nkflags );
public static extern int nk_button_symbol_text_styled( nk_context *ctx, nk_style_button *bstyle, nk_symbol_type stype, byte *s, int i, uint alignment_nkflags );
public static extern int nk_button_image_styled(nk_context *ctx, nk_style_button *bstyle, nk_image img);
public static extern int nk_button_symbol_styled(nk_context *ctx, nk_style_button *bstyle, nk_symbol_type stype);
public static extern int nk_button_label_styled(nk_context *ctx, nk_style_button *bstyle, byte *title);
public static extern int nk_button_text_styled(nk_context *ctx, nk_style_button *bstyle, byte *title, int len);