ล็อคหรือป้องกันรหัสผ่าน PPT โดยใช้ Java

Presentation presentation = new Presentation("pres.ppt");
try {
    presentation.getProtectionManager().encrypt("123123");
    presentation.save("encrypted-pres.ppt", SaveFormat.Ppt);
} finally {
    if (presentation != null) presentation.dispose();
}

Presentation presentation = new Presentation("pres.ppt");
try {
    presentation.getProtectionManager().setWriteProtection("123123");
    presentation.save("write-protected-pres.ppt", SaveFormat.Ppt);
} finally {
    if (presentation != null) presentation.dispose();
}