EnableExplicit

Define whandle

RunProgram("notepad.exe")

Delay(2000)

whandle = FindWindow_("notepad",#Null)
SetWindowLongPtr_(whandle,#GWL_EXSTYLE,GetWindowLongPtr_(whandle,#GWL_EXSTYLE) | #WS_EX_LAYERED)
SetLayeredWindowAttributes_(whandle, 0, (255 * 50) / 100, #LWA_ALPHA)