if anyone wants to do exactly what you're after without installing other stuff like qres, you can actually do this all in AHK without additional programs/software
here is an example I what I am doing. I also got this from the AHK forums, the actual bit on how to adjust all the display parameters that is. I am using this because I have a 120Hz display and wanted to play the Super Mario 64 PC Port and it kinda sorta freaks out when you enable the 60FPS mod but are on a 120Hz. So I needed to change my refresh rate to 60Hz when game launches and then back to 120Hz when it exits. The concept is the same, but I would think this is more elegant due to not needing additional resources like qres
Apologies, the AHK script I originally included seemed to only work with the AHK version included with RocketLauncher but NOT the AHK version included with LaunchBox. I have cleaned up this script and edited my post to include this version that is much more compact but now actually works with LaunchBox. Apparently some things I was using were deprecated so the actual bits that were supposed to change display properties was not working. Here is updated script code.
WinWait, ahk_exe Super Mario 64 PC.exe
ChangeDisplaySettings(32, 3840, 2160, 60)
WinWaitClose, ahk_exe Super Mario 64 PC.exe
ChangeDisplaySettings(32, 3840, 2160, 120)
ChangeDisplaySettings(cD, sW, sH, rR)
{
VarSetCapacity(dM,156,0), NumPut(156,2,&dM,36)
DllCall("EnumDisplaySettingsA", UInt,0, UInt,-1, UInt,&dM), NumPut(0x5c0000,dM,40)
NumPut(cD,dM,104), NumPut(sW,dM,108), NumPut(sH,dM,112), NumPut(rR,dM,120)
Return DllCall("ChangeDisplaySettingsA", UInt,&dM, UInt,0)
}
