将窗口最小化为时钟旁的小图标（PowerBulider）[1]

建立主窗口"w_main"，口定义如下"local external fuctions":

function long loadlibrary( ref string string ) library "kernel32" alias for loadlibrarya

function long freelibrary( long long ) library "kernel32" 

function boolean shell_notifyicon( ulong long, ref s_str str ) library "shell32" alias for "shell_notifyicona"

function long loadicon( long long, long long ) library "user32" alias for loadicona

定义结构型变量：

s_str: