add flat assembler toolchain

toolchain/fasmw17332/EXAMPLES/WIN64/PE64DEMO/PE64DEMO.ASM

@@ -0,0 +1,45 @@
+
+; Example of 64-bit PE program
+
+format PE64 GUI
+entry start
+
+section '.text' code readable executable
+
+  start:
+	sub	rsp,8*5 	; reserve stack for API use and make stack dqword aligned
+
+	mov	r9d,0
+	lea	r8,[_caption]
+	lea	rdx,[_message]
+	mov	rcx,0
+	call	[MessageBoxA]
+
+	mov	ecx,eax
+	call	[ExitProcess]
+
+section '.data' data readable writeable
+
+  _caption db 'Win64 assembly program',0
+  _message db 'Hello World!',0
+
+section '.idata' import data readable writeable
+
+  dd 0,0,0,RVA kernel_name,RVA kernel_table
+  dd 0,0,0,RVA user_name,RVA user_table
+  dd 0,0,0,0,0
+
+  kernel_table:
+    ExitProcess dq RVA _ExitProcess
+    dq 0
+  user_table:
+    MessageBoxA dq RVA _MessageBoxA
+    dq 0
+
+  kernel_name db 'KERNEL32.DLL',0
+  user_name db 'USER32.DLL',0
+
+  _ExitProcess dw 0
+    db 'ExitProcess',0
+  _MessageBoxA dw 0
+    db 'MessageBoxA',0