Delphi DLL

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>

Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, HttpResponse, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
jsonOAuthCC: HCkJsonObject;
userId: PWideChar;
meetingId: PWideChar;
sbUrl: HCkStringBuilder;
numReplaced: Integer;
url: PWideChar;
resp: HCkHttpResponse;
jsonResp: HCkJsonObject;
statusCode: Integer;

begin
success := False;

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

http := CkHttp_Create();

// Provide the information needed for Chilkat to automatically fetch the OAuth2.0 
// access token as needed.
jsonOAuthCC := CkJsonObject_Create();

// --------------------------------------------------------------------------------------------------------
// 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.
CkJsonObject_UpdateString(jsonOAuthCC,'client_id','e1cd2318-xxxx-4916-bfd6-xxxxxxxxxxxx');
CkJsonObject_UpdateString(jsonOAuthCC,'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.
CkJsonObject_UpdateString(jsonOAuthCC,'scope','https://graph.microsoft.com/.default');

// The token endpoint includes your tenant ID.  Use your tenant ID (not the tenant ID shown here).
CkJsonObject_UpdateString(jsonOAuthCC,'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,
CkHttp_putAuthToken(http,CkJsonObject__emit(jsonOAuthCC));

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

// 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 := CkStringBuilder_Create();
CkStringBuilder_Append(sbUrl,'https://graph.microsoft.com/v1.0/users/{userId}/onlineMeetings/{meetingId}');
numReplaced := CkStringBuilder_Replace(sbUrl,'{userId}',userId);
numReplaced := CkStringBuilder_Replace(sbUrl,'{meetingId}',meetingId);

url := CkStringBuilder__getAsString(sbUrl);
resp := CkHttpResponse_Create();
success := CkHttp_HttpNoBody(http,'DELETE',url,resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

jsonResp := CkJsonObject_Create();
CkJsonObject_Load(jsonResp,CkHttpResponse__bodyStr(resp));
CkJsonObject_putEmitCompact(jsonResp,False);
Memo1.Lines.Add(CkJsonObject__emit(jsonResp));

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

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

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

CkHttp_Dispose(http);
CkJsonObject_Dispose(jsonOAuthCC);
CkStringBuilder_Dispose(sbUrl);
CkHttpResponse_Dispose(resp);
CkJsonObject_Dispose(jsonResp);

end;