HWND TaskBarHandle,ChildWindowHandle; 
char WindowClass[256]; 
TaskBarHandle=FindWindow("Shell_TrayWnd",NULL);       //get taskbar Handle 
if(TaskBarHandle) 
{ 
  ChildWindowHandle=GetWindow(TaskBarHandle,GW_CHILD); 
  while (ChildWindowHandle) 
  { 
    GetClassName(ChildWindowHandle,WindowClass,255);  //get child Handle 
    if(!strcmp(WindowClass,"Button"))                 //if it's a button 
      ShowWindow(ChildWindowHandle,SW_HIDE);          // hide button 
    ChildWindowHandle=GetWindow(ChildWindowHandle,GW_HWNDNEXT); //get next child 
  } 
} 
 

ShowWindow(ChildWindowHandle,SW_SHOW);