AddrAfterDirectDrawCreate     = 0x408D8E
AddrAfterGetCaps              = 0x408E11
AddrAfterDirectDrawEnumerateA = 0x4094C9

function debugger_onBreakpoint()
    local NumSuitableDDDevices = readInteger(0x50B658)
    if (EIP == AddrAfterDirectDrawCreate) then
        print("ExamineDDEnumCallback: DirectDrawCreate" ..
            " returned " .. string.format("0x%08X", EAX) ..
            " for device #" .. NumSuitableDDDevices)
    elseif (EIP == AddrAfterGetCaps) then
        print("ExamineDDEnumCallback: GetCaps" ..
            " returned " .. string.format("0x%08X", EAX) ..
            " for device #" .. NumSuitableDDDevices)
    elseif (EIP == AddrAfterDirectDrawEnumerateA) then
        print("Found " .. NumSuitableDDDevices .. " suitable DirectDraw devices")
    end
    debug_continueFromBreakpoint(co_run)
end

debug_setBreakpoint(AddrAfterDirectDrawCreate)
debug_setBreakpoint(AddrAfterGetCaps)
debug_setBreakpoint(AddrAfterDirectDrawEnumerateA)