{"id":172,"date":"2010-03-30T21:07:27","date_gmt":"2010-03-30T21:07:27","guid":{"rendered":"https:\/\/ibex.tech\/visualcpp\/?p=172"},"modified":"2022-02-17T06:24:05","modified_gmt":"2022-02-17T06:24:05","slug":"general-form-usage","status":"publish","type":"post","link":"https:\/\/ibex.tech\/visualcpp\/forms\/general-form-usage","title":{"rendered":".General Form Usage"},"content":{"rendered":"

\nOpening a form
\n<\/h4>\n
\r\n\r\n#include "FormName.h"\t\t\t\/\/Add this at top of file\r\n\r\n\tfrmConfiguration ^ConfigForm = gcnew frmConfiguration();\r\n\tConfigForm->PassedValue1 = "This is a string I'm passing";\r\n\r\n\t\/\/TO OPEN AS A DIALOG FORM:\r\n\tConfigForm->ShowDialog();\r\n\t\/\/or\r\n\tif (ConfigForm->ShowDialog() == System::Windows::Forms::DialogResult::OK)\r\n\telse if (ConfigForm->DialogResult == System::Windows::Forms::DialogResult::Cancel)\r\n\r\n\t\/\/TO OPEN NOT AS A DIALOG FORM:\r\n\tConfigForm->Show();\r\n<\/code><\/pre>\n
\nClosing a form
\n<\/h4>\n
\r\n\r\n\tClose();\r\n\t\/\/or\r\n\tthis->Close();\r\n<\/code><\/pre>\n
\nClosing a form from the Form Load Event
\n<\/h4>\n
\nYou can't use this->Close as the form has not yet finished loading so if you do you'll cause fatal error. Instead use this:\n<\/p>\n
\r\n\r\n\tthis->BeginInvoke(gcnew MethodInvoker(this, &System::Windows::Forms::Form::Close));\r\n<\/code><\/pre>\n
\nDynamically updating Form Properties
\n<\/h4>\n
\nUse this instead of the forms name:\n<\/p>\n
\r\n\tthis->Text = "A New Title For This Form";<\/code><\/pre>\n
\nTo Disable A Form
\n<\/h4>\n
\r\n\r\n\t\/\/This form\r\n\tthis->Enabled = false;\r\n\t\/\/Another form\r\n\tfrmMyForm->Enabled = false;\r\n<\/code><\/pre>\n
\nWhy Is A Form Closing?
\n<\/h4>\n
\nYou can use things like this (see the CloseReason members):\n<\/p>\n
\r\nif (e->CloseReason == System::Windows::Forms::CloseReason::UserClosing)<\/code><\/pre>\n
\nSupressing Display Update Of A Form
\n<\/h4>\n
\nYou can't stop a form being painted, but you can do this:\n<\/p>\n
\r\n\r\n\tthis->SuspendLayout();\r\n\tMyControlName1->SuspendLayout();\r\n\tMyControlName2->SuspendLayout();\r\n\t...\r\n\tMyControlName1->ResumeLayout();\r\n\tMyControlName2->ResumeLayout();\r\n\tthis->ResumeLayout();\r\n<\/code><\/pre>\n
\nYou can also make specific controls invisible\n<\/p>\n
\nDefault Accept and Cancel Buttons
\n<\/h4>\n
\nSet in the forms AcceptButton and CancelButton properties.
\nSet Dialog result for each button\n<\/p>\n
\nReturning a Dialog Result
\n<\/h4>\n
\nYou can assign a dialog result value to buttons on the form in their properties.\n<\/p>\n
\nStopping A Form \/ Application From Closing
\n<\/h4>\n
\nHandle the form's 'Closing' event and set 'e.Cancel' to 'True' if you want to prevent the form from closing.
\ne->Cancel = true;
\nIf your going to present a message box, such as a 'do you want to save' then you need to do the cancel first to stop the ap closing while waiting for the user input. Then afterwards do the close.<\/p>\n","protected":false},"excerpt":{"rendered":"
Opening a form #include "FormName.h" \/\/Add this at top of file frmConfiguration ^ConfigForm = gcnew frmConfiguration(); ConfigForm->PassedValue1 = "This is a string I'm passing"; \/\/TO OPEN AS A DIALOG FORM: ConfigForm->ShowDialog(); \/\/or if (ConfigForm->ShowDialog() == System::Windows::Forms::DialogResult::OK) else if (ConfigForm->DialogResult == System::Windows::Forms::DialogResult::Cancel) \/\/TO OPEN NOT AS A DIALOG FORM: ConfigForm->Show(); Closing a form Close(); \/\/or this->Close(); […]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[25],"tags":[],"class_list":["post-172","post","type-post","status-publish","format-standard","hentry","category-forms"],"_links":{"self":[{"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts\/172","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=172"}],"version-history":[{"count":8,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts\/172\/revisions"}],"predecessor-version":[{"id":1390,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/posts\/172\/revisions\/1390"}],"wp:attachment":[{"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/media?parent=172"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/categories?post=172"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ibex.tech\/visualcpp\/wp-json\/wp\/v2\/tags?post=172"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}