I see you use emulators........... The expert is here on recommendation from super moderator Sheep. Let me just give you a simple layout of the key patterns.
Z=A
X=B
A=L or Left Shoulder button
S=R or Right Shoulder button
Enter key=Start button
Backspace key=Select button
If you could tell me what ROM you're playing, I could give you help related to that specific game and the functions of the keys. Also, tell me if the emulator you're using is VisualBoy Advance or DesMume or something else, as they all have different control patterns. Hope I help.
Z=A
X=B
A=L or Left Shoulder button
S=R or Right Shoulder button
Enter key=Start button
Backspace key=Select button
If you could tell me what ROM you're playing, I could give you help related to that specific game and the functions of the keys. Also, tell me if the emulator you're using is VisualBoy Advance or DesMume or something else, as they all have different control patterns. Hope I help.