You don’t need to use icons or bitmap to create buttons with arrows on them. In fact, you just have to select the “Windings” font, set a suitable font size (e.g. 12 or 14 points), and then enter one of these characters:
Line arrows
Chr$(223) Left Arrow
Chr$(224) Right Arrow
Chr$(225) Up Arrow
Chr$(226) Down Arrow
Chr$(227) Up-Left Arrow
Chr$(228) Up-Right Arrow
Chr$(229) Down-Left Arrow
Chr$(230) Down-Right Arrow
Solid arrows
Chr$(231) Left Arrow
Chr$(232) Right Arrow
Chr$(233) Up Arrow
Chr$(234) Down Arrow
Chr$(235) Up-Left Arrow
Chr$(236) Up-Right Arrow
Chr$(237) Down-Left Arrow
Chr$(238) Down-Right Arrow
Outlined arrows
Chr$(239) Left Arrow
Chr$(240) Right Arrow
Chr$(241) Up Arrow
Chr$(242) Down Arrow
Chr$(245) Up-Left Arrow [note the gap here]
Chr$(246) Up-Right Arrow
Chr$(247) Down-Left Arrow
Chr$(248) Down-Right Arrow
This font include many other useful symbols, such as hands, airplanes, mailboxes, astrological signs, smileys, circled digits, checkmarks, and more.