_plugin_registerexprfunction

This function registers an expression function defined by a plugin, so that users can use it in expressions. All arguments are integer type.

bool _plugin_registerexprfunction( int pluginHandle, //plugin handle const char* name, //name of expresison function int argc, //number of arguments CBPLUGINEXPRFUNCTION cbFunction, //callback function void* userdata //user data );

参数

pluginHandle:调用插件的句柄。 name:Name of expresison function. argc:Number of arguments of expression function. cbFunction:回调，其类型定义如下：

typedef duint(*CBPLUGINEXPRFUNCTION)(int argc, const duint* argv, void* userdata);

userdata:A pointer value passed to the callback, may be used by plugin to pass additional information.

Return Values

Return true when the registration is successful, otherwise return false.