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a as byte
b as byte
c as word
d as word
e as word
f as dword

a = 255
b = 255
d = 65535
e = 65535

temp1 as word
temp1 = a << 8
c = temp1 + b

temp2 as dword
temp2 = d << 16
f = temp2 + e

print "Binary of a(left) and b(right) bytes : ",right$(bin$(a),8)," ", right$(bin$(b),8)
print "Binary of c (word) of a + b :          ",right$(bin$(c),16)
print "Binary of d(left) and e(right) words : ",right$(bin$(d),16)," ", right$(bin$(e),16)
print "Binary of f (dword) of a + b :         ",right$(bin$(f),32)
wait key

a as byte
b as byte
c as word
d as byte
e as byte
f as byte
g as byte
h as dword
`set word value
`c = 65535
c = 1
`set dword value
`h = 4294967295
h = 1

temp as dword
`decode to byte (a) from word (c)
a = c >> 8
`decode to byte (b) from word (c)
temp = c << 8
b = temp >> 8
`Convert 2 bytes (a and b) to word (c)
temp = a << 8
c = temp + b

`decode to byte (d) from dword (h)
d = h >> 24
`decode to byte (e) from dword (h)
temp = h >> 16
temp = temp << 24
e = temp >> 24
`decode to byte (f) from dword (h)
temp = h >> 8
temp = temp << 24
f = temp >> 24
`decode to byte (g) from dword (h)
temp = h << 24
g = temp >> 24

`convert 4 bytes (d,e,f, and g) to dword (h)
temp = d << 24
h = temp
temp = e << 16
h = h + temp
temp = f << 8
h = h + temp + g

print a
print b
print c
print d
print e
print f
print g
print h
wait key

#include <stdio.h>
#include <windows.h>

int main(int argc, char* argv[])
{
    FILE* MyFile;
    DWORD ValueOut=123456;
    DWORD ValueIn=123456;

    MyFile=fopen("test.dat", "wb");
    fwrite(&ValueOut, sizeof(ValueOut), 1, MyFile);
    fclose(MyFile);

    MyFile=fopen("test.dat", "rb");
    fread(&ValueIn, sizeof(ValueIn), 1, MyFile);
    fclose(MyFile);

    printf("%d\n", ValueIn);

    return 0;
}