They are the keyboard scancodes.
You can find out which one is which by using the command :
int dbScanCode();
It's return value, if higher than 0, will be the scancode of the key that is pressed, so you could easily write a little program to display the value that dbScanCode is returning to the screen and write down what that number is for each key you press, then you could just make a list so you know which code is for which key... would also be good practice to get to know GDK.
PS . If you have a look around there are various lists of scancode defines in header files, I think dinput.h has a set of scancode defines that you can use ... ill post a half complete set here that will get you started :
// Generic keyboard scancode defines
#define Key_Escape 1
#define Key_A 30
#define Key_B 48
#define Key_C 46
#define Key_D 32
#define Key_E 18
#define Key_F 33
#define Key_G 34
#define Key_H 35
#define Key_I 23
#define Key_J 36
#define Key_K 37
#define Key_L 38
#define Key_M 50
#define Key_N 49
#define Key_O 24
#define Key_P 25
#define Key_Q 16
#define Key_R 19
#define Key_S 31
#define Key_T 20
#define Key_U 22
#define Key_V 47
#define Key_W 17
#define Key_X 45
#define Key_Y 21
#define Key_Z 44
#define Key_F1 59
#define Key_F2 60
#define Key_F3 61
#define Key_F4 62
#define Key_F5 63
#define Key_F6 64
#define Key_F7 65
#define Key_F8 66
#define Key_F9 67
#define Key_F10 68
#define Key_LeftSingleQuote 41
#define Key_1 2
#define Key_2 3
#define Key_3 4
#define Key_4 5
#define Key_5 6
#define Key_6 7
#define Key_7 8
#define Key_8 9
#define Key_9 10
#define Key_0 11
#define Key_Minus 12
#define Key_Equal 13
#define Key_BackSpace 14
#define Key_Tab 15
#define Key_LeftBracket 26
#define Key_RightBracket 27
#define Key_BackSlash 43
#define Key_Enter 28
#define Key_Caps 58
#define Key_LShift 42
#define Key_RShift 54
#define Key_SemiColon 39
#define Key_SingleQuote 40
#define Key_Comma 51
#define Key_Period 52
#define Key_ForwardSlash 53
#define Key_LWinKey 219
#define Key_LAlt 56
#define Key_RAlt 184
#define Key_RWinKey 220
#define Key_WinMenu 221
#define Key_LCntl 29
#define Key_RCntl 157
#define Key_PrintScreen 183
#define Key_ScrollLock 70
#define Key_Break 197
#define Key_Ins 210
#define Key_Del 211
#define Key_Home 199
#define Key_End 207
#define Key_PgUp 201
#define Key_PgDn 209
#define Key_UpArrow 200
#define Key_DownArrow 208
#define Key_LeftArrow 203
#define Key_RightArrow 205
#define Key_NumLock 69
#define Key_NumForwardSlash 181
#define Key_NumStar 55
#define Key_NumMinus 74
#define Key_NumPlus 78
#define Key_NumEnter 156
#define Key_NumPeriod 83
#define Key_Num1 79
#define Key_Num2 80
#define Key_Num3 81
#define Key_Num4 75
#define Key_Num5 76
#define Key_Num6 77
#define Key_Num7 71
#define Key_Num8 72
#define Key_Num9 73
#define Key_Num0 82
#define Key_SpaceBar 57
If it ain't broke.... DONT FIX IT !!!