Are there any ways to get UEFI boot items on Windows

Question

I've been working on UEFI and GPT recently. I want to get the UEFI boot item under WIndows, but I looked at MSDN and found no suitable API. Please ask me how to query the UEFI boot item under Windows

It just likes this below:

Answer 1

You can use the GetFirmwareEnvironmentVariableA function to get the BootOrder variable first and then the single boot options (Boot####).

You need the SE_SYSTEM_ENVIRONMENT_NAME privilege to call GetFirmwareEnvironmentVariableA.

The structures and names of the required variables are defined in the uefi specification, starting at chapter 3.

DWORD BootOrderContentLength;
DWORD Error;
BYTE BootOrderContent[256];

BootOrderContentLength = GetFirmwareEnvironmentVariableA(
    "BootOrder",
    "{8BE4DF61-93CA-11D2-AA0D-00E098032B8C}",
    (VOID*)BootOrderContent,
    (DWORD)sizeof(BootOrderContent));

if (BootOrderContentLength == 0) {
    Error = GetLastError();
    //...
}