(Unicode C++) Permanently Delete a Specific GMail Message

Immediately and permanently deletes the specified message. This operation cannot be undone. (This is not the same as moving a message to Trash.)

Chilkat C/C++ Library Downloads
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#include <CkHttpW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    bool success;

    CkHttpW http;
    http.put_AuthToken(L"GMAIL-ACCESS-TOKEN");

    // The id of the GMail message to delete.
    const wchar_t *id = L"1669cc9a926bb8c1";
    const wchar_t *userId = L"me";

    http.SetUrlVar(L"userId",L"me");
    http.SetUrlVar(L"id",id);

    // Delete the email.
    const wchar_t *url = L"https://www.googleapis.com/gmail/v1/users/{$userId}/messages/{$id}";
    const wchar_t *responseStr = http.quickDeleteStr(url);
    if (http.get_LastMethodSuccess() != true) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    wprintf(L"status = %d\n",http.get_LastStatus());

    // A 204 response indicate success.
    // It is common for HTTP DELETE operations to respond with a 204 status code with an empty body for success.
    // You'll find many REST APIs follow this custom..
    if (http.get_LastStatus() != 204) {
        wprintf(L"%s\n",responseStr);
        wprintf(L"Failed.\n");
        return;
    }

    wprintf(L"Message deleted!\n");
    }