(Delphi ActiveX) MS Teamwork: Delete an Online Meeting

See more Microsoft Teams Examples

Demonstrates how to delete a Microsoft Teamwork Online Meeting

Note:If using Application access (i.e. client credentials) which is what this example is doing, then you'll need to "Configure application access to online meetings or virtual events" See https://learn.microsoft.com/en-us/graph/cloud-communication-online-meeting-application-access-policy#configure-application-access-policy

For example, here's our Powershell session to setup the policy.

Windows PowerShell
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PS C:\WINDOWS\system32> Install-Module -Name PowerShellGet -Force -AllowClobber
PS C:\WINDOWS\system32> Install-Module -Name MicrosoftTeams -Force -AllowClobber
PS C:\WINDOWS\system32> Connect-MicrosoftTeams

Account              Environment Tenant                               TenantId
-------              ----------- ------                               --------
admin@chilkat365.com AzureCloud  112d7ed6-71bf-4eba-a866-738364321bfc 112d7ed6-71bf-4eba-a866-738364321bfc

PS C:\WINDOWS\system32> New-CsApplicationAccessPolicy -Identity Test-Teams-policy -AppIds "e1cd2318-298b-4916-bfd6-78cae9938835" -Description "Want App to be able to work with Teams for a User"

Identity    : Tag:Test-Teams-policy
AppIds      : {e1cd2318-298b-4916-bfd6-78cae9938835}
Description : Want App to be able to work with Teams for a User

PS C:\WINDOWS\system32> Grant-CsApplicationAccessPolicy -PolicyName Test-Teams-policy -Identity "4ee732c3-322e-4a6b-b729-2fd1eb5c6004"
PS C:\WINDOWS\system32>

Note: This example uses the new "Integrated OAuth2 Client Credentials" feature introduced in Chilkat v9.5.0.96.

For more information, see https://learn.microsoft.com/en-us/graph/api/onlinemeeting-delete?view=graph-rest-1.0&tabs=http

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Integer;
http: TChilkatHttp;
jsonOAuthCC: TChilkatJsonObject;
userId: WideString;
meetingId: WideString;
sbUrl: TChilkatStringBuilder;
numReplaced: Integer;
resp: IChilkatHttpResponse;
jsonResp: TChilkatJsonObject;
statusCode: Integer;

begin
// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

http := TChilkatHttp.Create(Self);

// Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
// access token as needed.
// This is the new "Integrated OAuth2 Client Credentials" feature introduced in Chilkat v9.5.0.96.  
jsonOAuthCC := TChilkatJsonObject.Create(Self);

// --------------------------------------------------------------------------------------------------------
// You'll need to have registered an app in Azure beforehand.
// 
// Note: Deleting an online meeting requires the following Application permission:  OnlineMeetings.ReadWrite.All
// 
// See How to Create an Azure App Registration for OAuth 2.0 Client Credentials
// --------------------------------------------------------------------------------------------------------

// Use the values from your App Registration in Azure.
jsonOAuthCC.UpdateString('client_id','e1cd2318-xxxx-4916-bfd6-xxxxxxxxxxxx');
jsonOAuthCC.UpdateString('client_secret','K.d8Q~RoJxxxxvCj_u_xxxxxxxxxxxxxxxxxxxxx');

// You'll always use this scope for client credentials, because the allowed actions
// are determined by the App Permissions defined when you registered the app in Azure.
jsonOAuthCC.UpdateString('scope','https://graph.microsoft.com/.default');

// The token endpoint includes your tenant ID.  Use your tenant ID (not the tenant ID shown here).
jsonOAuthCC.UpdateString('token_endpoint','https://login.microsoftonline.com/112d7ed6-71bf-4eba-a866-738364321bfc/oauth2/v2.0/token');

// Provide the OAuth2 information. Chilkat will use this information to automatically fetch the OAuth2 access token as needed,
http.AuthToken := jsonOAuthCC.Emit();

// -------------------------------------------------------------------------------------------

// To delete an online meeting, send a DELETE request like this:
// 
// DELETE https://graph.microsoft.com/v1.0/users/{userId}/onlineMeetings/{meetingId}

userId := '4ee732c3-322e-4a6b-b729-2fd1eb5c6004';
meetingId := 'MSo0ZWU3MzJjMy0zMjJlLTRhNmItYjcyOS0yZmQxZWI1YzYwMDQqMCoqMTk6bWVldGluZ19ZemswWXpOaU9XTXRaV0l5TUMwME5EY3dMVGt4Tm1VdFlUSXpOMlF3WTJKbE9HWm1AdGhyZWFkLnYy';

sbUrl := TChilkatStringBuilder.Create(Self);
sbUrl.Append('https://graph.microsoft.com/v1.0/users/{userId}/onlineMeetings/{meetingId}');
numReplaced := sbUrl.Replace('{userId}',userId);
numReplaced := sbUrl.Replace('{meetingId}',meetingId);

resp := http.QuickRequest('DELETE',sbUrl.GetAsString());
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

jsonResp := TChilkatJsonObject.Create(Self);
jsonResp.Load(resp.BodyStr);
jsonResp.EmitCompact := 0;
Memo1.Lines.Add(jsonResp.Emit());

statusCode := resp.StatusCode;
Memo1.Lines.Add('response status code = ' + IntToStr(statusCode));

if (statusCode <> 204) then
  begin
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

Memo1.Lines.Add('Success.');
end;