(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 <CkHttp.h>

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

    bool success;

    CkHttp http;
    http.put_AuthToken("GMAIL-ACCESS-TOKEN");

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

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

    // Delete the email.
    const char *url = "https://www.googleapis.com/gmail/v1/users/{$userId}/messages/{$id}";
    const char *responseStr = http.quickDeleteStr(url);
    if (http.get_LastMethodSuccess() != true) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    std::cout << "status = " << http.get_LastStatus() << "\r\n";

    // 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) {
        std::cout << responseStr << "\r\n";
        std::cout << "Failed." << "\r\n";
        return;
    }

    std::cout << "Message deleted!" << "\r\n";
    }