C# calling/holding/releasing keys ( not working on game controls)

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C#

keypress

keyboard

The following code holds keys and releases it

[DllImport("user32.dll", SetLastError = true)]
        static extern void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

        public const int KEYEVENTF_KEYUP = 0x02;
        public const int VK_W = 0x57;

        private void timer1_Tick(object sender, EventArgs e)
        {
            keybd_event(VK_W, 0, 0, 0);
            // keybd_event(VK_W, 0, KEYEVENTF_KEYUP, 0);
        }

This does work but not in Minecraft. After a hour of headache I found that I can't call minecraft defined controls. for example if I had 'Walk Foward' key set to 'W' I can't call that key programmitcaly unless I change that key to something else. But there are other key pressing applications that works with games, how they do it? Is there any other API that is capable of calling and holding keys?

What I have tried:

Tested the code on other applications works fine.