As for your example, it works fine on my system:
;SystemParametersInfo%(uiAction%, uiParam%, pvParam*, fWinIni%):"SystemParametersInfoA" Type mouseparams Field amouse Field bmouse Field cmouse End Type workdammit.mouseparams=New mouseparams Print SystemParametersInfo(3, 0, workdammit, 0) Print workdammit\amouse Print workdammit\bmouse Print workdammit\cmouse WaitKey