Here are some shortcut keys below you can add to Buttons.
If we want to create
ss2<Enter>
 Opens the Recently Played Songs dialog.
Put it under the Tab number and adjust x2 y150 for position, cBlue = color of text
Gui, Add, Text, x2 y150 cBlue gRecentSongs, Recent Songs
then put the function under
;FUNCTIONS =================
RecentSongs:
Winactivate, ahk_class TBandWindow
Send,  ss2 + {Enter}
return
If you want to send Ctrl + S
Send,  ^s 
or Alt + W
Send,  !w
or Shift + F1
Send,  +{F1} 
or Ctrl+Shift+G
^+G
or Win Key
Send, #
See more 
https://www.autohotkey.com/docs/commands/Send.htm========================================
SHORTCUT KEY LIST
========================================
Quick-Load Songs and Stylesss<Enter>
 Opens the SongPicker. 
ss1<Enter>
 Opens the SongPicker. 
ss2<Enter>
 Opens the Recently Played Songs dialog. 
ss3<Enter>
 Opens the Favorite Songs dialog. 
ss4<Enter>
 Opens a song from the disc. 
ss5<Enter>
 Opens the SongPicker. 
ss6<Enter>
 Opens the Favorite Folders dialog. 
ss7<Enter>
 Opens the previous song (alphabetical). 
ss8<Enter>
 Opens the next song (alphabetical). 
ss9<Enter>
 Opens a MIDI file. 
ss10<Enter>
 Opens an audio file. 
ss11<Enter>
 Opens the Find Song Files dialog. 
ss12<Enter>
 Opens the song demo for the current style. 
ss13<Enter>
 Opensa Karaoke file. 
ss14<Enter>
 Launches the Audio Chord Wizard. 
s<Enter>
 Opens the StylePicker. 
s1<Enter>
 Opens the StylePicker. 
s2<Enter>
 Shows the Best RealStyles list. 
s3<Enter>
 Opens the Song Titles Brower. 
s4<Enter>
 Opens the Recently Played Styles dialog. 
s5<Enter>
 Opens the Favorite Styles dialog. 
s6<Enter>
 Loads a style from the disc. 
s7<Enter>
 Loads the previous style (alphabetical). 
s8<Enter>
 Loads the next style (alphabetical). 
s9<Enter>
 Loads the song demo for the current style. 
s10<Enter>
 Plays the audio demo for the current style. 
Quick-Open for RealTracks/RealDrums/Loops Dialogsrt<Enter>
 Opens the RealTracks Picker. 
rt1<Enter>
 Opens the RealTracks Picker. 
rt2<Enter>
 Opens the RealTracks Settings dialog. 
rt3<Enter>
 Opens the Select Best All RealTracks dialog. 
rt4<Enter>
 Opens the Select Best Chording RealTracks dialog. 
rt5<Enter>
 Opens the Select Best Soloist RealTracks dialog. 
rd<Enter>
 Opens the RealDrums Picker. 
rd1<Enter>
 Opens the RealDrums Picker. 
rd2<Enter>
 Opens the RealDrums Settings dialog. 
rd3<Enter>
 Opens the RealDrums QuickList dialog. 
rl<Enter>
 Opens the Pick a Loop dialog. 
Muting PartsAlt+2
 Mutes all tracks 
Alt+3
 Mutes the Bass track 
Alt+4
 Mutes the Piano track 
Alt+5
 Mutes the Drums track 
Alt+6
 Mutes the Guitar track 
Alt+7
 Mutes the Strings track 
Alt+8
 Mutes the Melody track 
Alt+9
 Mutes the Soloist track 
Alt+0
 Mutes the Thru track 
Selecting PartsCtrl+2
 Selects the Master 
Ctrl+3
 Selects the Bass track 
Ctrl+4
 Selects the Piano track 
Ctrl+5
 Selects the Drums track 
Ctrl+6
 Selects the Guitar track 
Ctrl+7
 Selects the Strings track 
Ctrl+8
 Selects the Melody track 
Ctrl+9
 Selects the Soloist track 
Ctrl+0
 Selects the Thru track 
Mixer SettingsCtrl+Shift+Q / W
 Decrease/increase current track’s volume by 5. 
Ctrl+Shift+E / R
 Decrease/increase current track’s panning by 5. 
Ctrl+Shift+T / Y
 Decrease/increase current track’s reverb by 5. 
Ctrl+Alt+Shift+R
 Set current track’s volume. 
Ctrl+Alt+A
 Decrease master volume by 5. 
Ctrl+Alt+S
 Increase master volume by 5. 
Ctrl+Alt+D
 Set master volume. 
Ctrl+Alt+Shift+Q
 Reduce all tracks’ volumes by 5. 
Ctrl+Alt+Shift+W
 Increase all tracks’ volumes by 5. 
Ctrl+Alt+Shift+E
 Set all tracks’ volumes. 
Looping / Song Navigation KeystrokesNUMPAD 1 Toggle looping on/off. 
NUMPAD 2
 Open Loop Section Settings dialog. 
Ctrl+NUMPAD 1
 Play with last chorus looped. 
Ctrl+NUMPAD 2
 Play with middle choruses looped. 
Ctrl+NUMPAD 3
 Play with middle and last choruses looped. 
Ctrl+NUMPAD 4
 Jump to last chorus. 
Ctrl+NUMPAD 5
 Jump to ending. 
Ctrl+NUMPAD 7
 Loop Notation screen. 
NUMPAD [DEL]
 Advances the notation, lead sheet, and guitar window by one chord (i.e. one group of notes at the same time). 
NUMPAD [INS]
 Backs up the notation, lead sheet, and guitar window by one chord. 
Transpose SettingsCtrl+Alt+1
 Transpose Melody down one octave 
Ctrl+Alt+2
 Transpose Melody up one octave 
Ctrl+Alt+3
 Transpose Soloist down one octave 
Ctrl+Alt+4
 Transpose Soloist up one octave 
Ctrl+Alt+5
 Transpose down 1 semitone. 
Ctrl+Alt+6
 Transpose up 1 semitone. 
Ctrl+Alt+7
 Transpose setting dialog. 
WindowsCtrl+W
 Toggle Notation and Chord Sheet windows. 
Ctrl+O
 Movable Notation window. 
Alt+W
 Lead Sheet window. 
Ctrl+T
 Put Notation/Chords at top of screen. 
Ctrl+~
 Conductor window. 
Ctrl+Shift+A
 Audio Edit window. 
Ctrl+Shift+D
 Drum Kit window. 
Ctrl+Shift+G
 Guitar window. 
Ctrl+Shift+J
 Ear training window. 
Ctrl+Shift+L
 Big Lyrics window. 
Ctrl+Shift+N
 Big Piano window. 
Ctrl+Shift+S
 Plug-in mode for DAW.  
Alt+Shift+L
 Practice window. 
Ctrl+Alt+Shift+L
 Lyric Document window 
StyleMaker Hot KeysF1, Shift+F1, Ctrl+F1
 Help 
F2
 Save style 
Alt+F2
 Save style as ... 
R or F3
 Record pattern 
<Spacebar> or F4
 Play pattern 
F8
 Play pattern on chord 
F10
 Edit pattern options 
F6 or Shift+F6
 Change instrument 
Cursor Keys
 Move around screen 
Alt+F4
 Quit the StyleMaker 
StyleMaker Drum Screen Hot KeysF5
 Drum alternate notes 
Bottom row (ZXCVBNM,. /)
 Drum note entry 
F6
 Time base 
F10 or Alt+F4
 Exit 
More Hot Keys/ <Enter>
 Feature Browser 
Spacebar twice or F4
 Play song. 
Spacebar or Esc
 Stop playing song 
F1
 Help. 
Ctrl+F1
 Help – Topic Search. 
Shift+F1
 Help – How To. 
Ctrl+R
 Record (melody or pattern). 
Ctrl+Alt+R
 Record from any bar. 
F8
 Jukebox start/stop. 
F2
 Save song. 
Alt+F2
 Save song with patches. 
F3 or s6<Enter>
 Load song. 
Shift+F3 or ss2<Enter>
 Load song using favorite song list. 
Ctrl+F3 or ss<Enter>
 Load song using the Song Picker window. 
Alt+F3
 Load songs with melodies. 
Alt+Shift+F3 or ss4<Enter>
 Load song with standard dialog. 
Shift+F8 or ss8<Enter>
 Load next song (alphabetically by file name). 
Ctrl+Shift+F8 or ss7<Enter>
 Load previous song (alphabetically by file name). 
Alt+Shift+F8 or s8<Enter>
 Load next style (in alphabetical order). 
Ctrl+Alt+Shift+F8 or s7<Enter>
 Load previous style (in alphabetical order). 
F7 or ss9<Enter>
 Open MIDI file. 
F9 or ss4<Enter>
 Choose a user style. 
Ctrl+F5
 Notation – switch to next track 
Ctrl+Shift+F5
 Notation – switch to previous track 
Ctrl+F9 or s<Enter>
 Open StylePicker. 
Shift+F9 or ss3<Enter>
 Select favorite styles. 
Alt+F9
 Edit user style. 
Ctrl+Shift+F9
 Edit current style. 
Shift+F7
 Refresh Melodist or Soloist 
Alt+F10
 Select Melody Harmony 
Ctrl+F10
 Favorite Melody Harmonies 
Shift+F10
 Allow Melody Harmony 
Alt+F11
 Select Thru Harmony 
Ctrl+F11
 Favorite Thru Harmonies 
Shift+F11
 Allow Thru Harmony 
Ctrl+Alt+E
 Turn song Embellisher on/off. 
Ctrl+Alt+I
 Import chords from MIDI file. 
Ctrl+Alt+Q
 Send GM mode on message. 
Ctrl+Alt+T
 Set tempo. 
Ctrl+E
 Open the Preferences dialog. 
Ctrl+N
 Open the Song Settings dialog. 
Ctrl+Shift+B
 Launch Chord Builder. 
Ctrl+Shift+F6
 Enable/Disable RealDrums 
F5
 Edit current bar options. 
F6
 Save MIDI file. 
Alt+C
 Open the Copy Chords and/or Melody dialog. 
Ctrl+Shift+V
 Open the Paste text to Song(s) dialog. 
Alt+Shift+T
 Auto-generate a title. 
Alt+Shift+F
 Open the Favorite Folders dialog. 
Alt+Shift+S
 Save the song to a favorite folder. 
Alt+F4
 Quit the program.