Try This:
copy the code below into DBP then save the source and the project to a folder, after that place the WinLockDll.dll in the same folder and run the code, this code should disable lots of things for 5 seconds
if dll exist(2)=0 then load dll "WinLockDll.dll",1
call dll 1,"CtrlAltDel_Enable_Disable",0
call dll 1,"AltTab2_Enable_Disable",0,0
call dll 1,"Keys_Enable_Disable",0
call dll 1,"TaskSwitching_Enable_Disable",0
call dll 1,"Desktop_Show_Hide",0
call dll 1,"StartButton_Show_Hide",0
call dll 1,"Taskbar_Show_Hide",0
wait 5000
call dll 1,"CtrlAltDel_Enable_Disable",1
call dll 1,"AltTab2_Enable_Disable",1,0
call dll 1,"Keys_Enable_Disable",1
call dll 1,"TaskSwitching_Enable_Disable",1
call dll 1,"Desktop_Show_Hide",1
call dll 1,"StartButton_Show_Hide",1
call dll 1,"Taskbar_Show_Hide",1
Alex
EDIT : sorry didnt see your post saying you go it working