83 lines
1.8 KiB
NASM
83 lines
1.8 KiB
NASM
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format PE64 GUI 5.0
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entry start
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include 'win64a.inc'
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section '.text' code readable executable
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start:
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sub rsp,8 ; Make stack dqword aligned
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invoke GetModuleHandle,0
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mov [wc.hInstance],rax
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invoke LoadIcon,0,IDI_APPLICATION
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mov [wc.hIcon],rax
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mov [wc.hIconSm],rax
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invoke LoadCursor,0,IDC_ARROW
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mov [wc.hCursor],rax
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invoke RegisterClassEx,wc
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test rax,rax
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jz error
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invoke CreateWindowEx,0,_class,_title,WS_VISIBLE+WS_DLGFRAME+WS_SYSMENU,128,128,256,192,NULL,NULL,[wc.hInstance],NULL
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test rax,rax
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jz error
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msg_loop:
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invoke GetMessage,msg,NULL,0,0
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cmp eax,1
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jb end_loop
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jne msg_loop
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invoke TranslateMessage,msg
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invoke DispatchMessage,msg
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jmp msg_loop
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error:
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invoke MessageBox,NULL,_error,NULL,MB_ICONERROR+MB_OK
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end_loop:
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invoke ExitProcess,[msg.wParam]
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proc WindowProc uses rbx rsi rdi, hwnd,wmsg,wparam,lparam
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; Note that first four parameters are passed in registers,
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; while names given in the declaration of procedure refer to the stack
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; space reserved for them - you may store them there to be later accessible
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; if the contents of registers gets destroyed. This may look like:
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; mov [hwnd],rcx
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; mov [wmsg],edx
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; mov [wparam],r8
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; mov [lparam],r9
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cmp edx,WM_DESTROY
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je .wmdestroy
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.defwndproc:
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invoke DefWindowProc,rcx,rdx,r8,r9
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jmp .finish
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.wmdestroy:
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invoke PostQuitMessage,0
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xor eax,eax
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.finish:
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ret
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endp
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section '.data' data readable writeable
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_title TCHAR 'Win64 program template',0
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_class TCHAR 'FASMWIN64',0
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_error TCHAR 'Startup failed.',0
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wc WNDCLASSEX sizeof.WNDCLASSEX,0,WindowProc,0,0,NULL,NULL,NULL,COLOR_BTNFACE+1,NULL,_class,NULL
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msg MSG
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section '.idata' import data readable writeable
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library kernel32,'KERNEL32.DLL',\
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user32,'USER32.DLL'
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include 'api\kernel32.inc'
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include 'api\user32.inc'
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