Add e2e tests

vendor/golang.org/x/sys/windows/syscall_windows.go

@@ -202,6 +202,21 @@ func NewCallbackCDecl(fn interface{}) uintptr {
 
 // syscall interface implementation for other packages
 
+// GetProcAddressByOrdinal retrieves the address of the exported
+// function from module by ordinal.
+func GetProcAddressByOrdinal(module Handle, ordinal uintptr) (proc uintptr, err error) {
+	r0, _, e1 := syscall.Syscall(procGetProcAddress.Addr(), 2, uintptr(module), ordinal, 0)
+	proc = uintptr(r0)
+	if proc == 0 {
+		if e1 != 0 {
+			err = errnoErr(e1)
+		} else {
+			err = syscall.EINVAL
+		}
+	}
+	return
+}
+
 func Exit(code int) { ExitProcess(uint32(code)) }
 
 func makeInheritSa() *SecurityAttributes {