Added Win32 and Win64 ASM Hello World

a/assembler_masm_win32.asm

@@ -0,0 +1,35 @@
+; ---------------------------------------------
+; Hello World for Win32 Intel x86 Assembly
+;
+; by fruel (https://github.com/fruel)
+; 13 June 2016
+; ---------------------------------------------
+
+.386
+.model flat,stdcall
+.stack 4096
+
+EXTRN ExitProcess@4 : PROC
+EXTRN GetStdHandle@4 : PROC
+EXTRN WriteConsoleA@20 : PROC
+
+.data
+msg BYTE "Hello World!",0
+bytesWritten DWORD ?
+
+.code
+main PROC
+    push -11                 ; nStdHandle (STD_OUTPUT_HANDLE)
+    call GetStdHandle@4
+ 
+    push 0                   ; lpReserved
+    push OFFSET bytesWritten ; lpNumberOfCharsWritten
+    push LENGTHOF msg - 1    ; nNumberOfCharsToWrite
+    push OFFSET msg          ; *lpBuffer
+    push eax                 ; hConsoleOutput
+    call WriteConsoleA@20
+
+    push 0                   ; uExitCode
+    call ExitProcess@4
+main ENDP
+END main

a/assembler_masm_win64.asm

@@ -0,0 +1,33 @@
+; ---------------------------------------------
+; Hello World for Win64 Intel x64 Assembly
+;
+; by fruel (https://github.com/fruel)
+; 13 June 2016
+; ---------------------------------------------
+
+GetStdHandle PROTO
+ExitProcess PROTO
+WriteConsoleA PROTO
+
+.data
+msg BYTE "Hello World!",0
+bytesWritten DWORD ?
+
+.code
+main PROC
+    sub rsp, 5 * 8              ; reserve shadow space
+
+    mov rcx, -11                ; nStdHandle (STD_OUTPUT_HANDLE)
+    call GetStdHandle
+
+    mov  rcx, rax               ; hConsoleOutput
+    lea  rdx, msg               ; *lpBuffer
+    mov  r8, LENGTHOF msg - 1   ; nNumberOfCharsToWrite
+    lea  r9, bytesWritten       ; lpNumberOfCharsWritten
+    mov  QWORD PTR [rsp + 4 * SIZEOF QWORD], 0  ; lpReserved
+    call WriteConsoleA
+
+    mov rcx, 0                  ; uExitCode
+    call ExitProcess
+main ENDP
+END