The GdiplusStartup function uses the GdiplusStartupOutput structure to return (in its output parameter) a pointer to a hook function and a pointer to an unhook function. If you set the SuppressBackgroundThread member of the input parameter to TRUE, then you are responsible for calling those functions to replace the Microsoft Windows GDI+ background thread.

 

Call the hook and unhook functions before and after the application's main message loop; that is, a message loop that is active for the lifetime of GDI+. Call the hook function before the loop starts, and call the unhook function after the loop ends. The token parameter of the hook function receives an identifier that you should later pass to the unhook function. If you do not pass the proper identifier (the one returned by the hook function) to the unhook function, there will be resource leaks that won't be cleaned up until the process exits.

 

If you do not want to be responsible for calling the hook and unhook functions, set the SuppressBackgroundThread member of the input parameter (passed to GdiplusStartup) to FALSE.

 

C++ Syntax

 

struct GdiplusStartupOutput {

NotificationHookProc NotificationHook;

NotificationUnhookProc NotificationUnhook;

};

 

FreeBASIC 语法

 

TYPE GdiplusStartupOutput

NotificationHook AS NotificationHookProc

NotificationUnhook AS NotificationUnhookProc

END TYPE

 

成员

 

NotificationHook

 

Receives a pointer to a hook function.

 

NotificationUnhook

 

Receives a pointer to an unhook function.