\nIf your application is doing asynchronous things, for instance a form has a callback function from a class receiving say some communications, then you will need to deal with calls to it in a thread safe way. The reason is that forms run on a single thread, but events in the other class will not necessarily be on the same thread. So to deal with this…\n<\/p>\n
\r\n\r\n\t\/\/DEAL WITH IN THREAD SAFE WAY\r\n\tvoid HandleEvent_MultiThreaded(void)\r\n\t{\r\n\t\t\/\/WE MAY NOT BE ON THE SAME THREAD AS THIS ACTUAL FORM, SO HANDLE CORRECTLY\r\n\t\tif (this->txtConnectionStatus->InvokeRequired)\t\t\t\t\t\t\t\/\/Change txtConnectionStatus to be some object on your form (or just use this->InvokeRequired if its possible)\r\n\t\t\tthis->Invoke(gcnew MethodInvoker(this, &frmMain::HandleEvent));\t\t\/\/Change frmMain if necessary to your forms class\r\n\t\telse\r\n\t\t\tHandleEvent();\r\n\t}\r\n\r\n\tprivate: void HandleEvent (void)\r\n\t{\r\n\t\ttxtConnectionStatus->Text = "Hello";\r\n\t\t\/\/...\r\n\t}\r\n<\/code><\/pre>\n\nWhen you do need to pass arguments
\n<\/h4>\n\r\n\r\n\t\/\/Declare a delegate\r\n\tprivate: delegate void HandleEvent_Del (int Type, array<unsigned char> ^RxData, int RxLength);\r\n\r\n\t\/\/DEAL WITH IN THREAD SAFE WAY\r\n\tvoid HandleEvent_MultiThreaded(int Type, array<unsigned char> ^RxData, int RxLength)\r\n\t{\r\n\t\t\/\/WE MAY NOT BE ON THE SAME THREAD AS THIS ACTUAL FORM, SO HANDLE CORRECTLY\r\n\t\tif (this->txtConnectionStatus->InvokeRequired)\t\t\t\t\t\t\/\/Change txtConnectionStatus to be some object on your form (or just use this->InvokeRequired if its possible)\r\n\t\t\tthis->Invoke(gcnew HandleEvent_Del(this, &frmMain::HandleEvent),Type, RxData, RxLength);\t\/\/Change frmMain if necessary to your forms class\r\n\t\telse\r\n\t\t\tHandleEvent(Type, RxData, RxLength);\r\n\t}\r\n\r\n\tprivate: void HandleEvent (int Type, array ^RxData, int RxLength)\r\n\t{\r\n\t\ttxtConnectionStatus->Text = Convert::ToString(Type);\r\n\t\t\/\/...\r\n\t}\r\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"If your application is doing asynchronous things, for instance a form has a callback function from a class receiving say some communications, then you will need to deal with calls to it in a thread safe way. The reason is that forms run on a single thread, but events in the other class will not […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[19],"tags":[],"class_list":["post-134","post","type-post","status-publish","format-standard","hentry","category-threads"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts\/134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/users\/5"}],"replies":[{"embeddable":true,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/comments?post=134"}],"version-history":[{"count":7,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts\/134\/revisions"}],"predecessor-version":[{"id":1137,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts\/134\/revisions\/1137"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/media?parent=134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/categories?post=134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/tags?post=134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}