### Install and Import go-win32api

Source: https://github.com/zzl/go-win32api/blob/main/README.md

Use these commands to add the package to your project and import the win32 module.

```bash
go get github.com/zzl/go-win32api/v2
```

```go
import "github.com/zzl/go-win32api/v2/win32"
```

--------------------------------

### Define C Union

Source: https://github.com/zzl/go-win32api/blob/main/README.md

Example of a C union structure that is mapped to Go accessor methods.

```c
union QWord {
    UINT64 WholeValue;
    struct {
        UINT32 LowPart;
        UINT32 HighPart;
    } Parts;
};
```

--------------------------------

### Access and Set Union Fields in Go

Source: https://github.com/zzl/go-win32api/blob/main/README.md

Demonstrates using accessor methods to read and write union fields in Go.

```go
var qw QWord
var whole uint64 = qw.WholeValueVal() // or whole = *qw.WholeValue()
var lowPart uint32 = qw.Parts().LowPart

// Setting values:
*qw.WholeValue() = 123
qw.Parts().LowPart = 4
```

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