## How to Send Multiple Characters with SendInput() Using KEYEVENTF_UNICODE?

Using SendInput to Transmit Multiple Characters

When it comes to transmitting characters using SendInput(), it can be a bit tricky to send multiple characters simultaneously.

The first aspect to consider is the number of INPUT structures. SendInput() takes the number of INPUT structures as input, so you need to ensure that you specify the correct value. In the code snippet you provided, you're trying to send two characters but only passing one INPUT structure, which is incorrect.

Additionally, each virtual key cannot be represented in a single INPUT structure. Instead, you need an array of multiple INPUT structures for each virtual key. This is because each key requires a keydown and a keyup event. Hence, for your example of sending two virtual keys, you need a total of four INPUT structures.

Regarding KEYEVENTF_UNICODE, it's important to note that it doesn't operate with virtual keys. Instead, it utilizes actual Unicode codepoints. Unicode codepoints are represented as UTF-16 codeunits, and each codepoint corresponds to one INPUT. This means that if you want to send a Unicode codepoint that requires a UTF-16 surrogate pair, you'll need two sets of down/up INPUTs. One set for the high surrogate and one for the low surrogate.

To transmit a string of Unicode characters using KEYEVENTF_UNICODE, you can follow a similar approach as outlined in the provided code snippet.

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