程式語言 - Flat Assembler (FASM) - Win32 API - Mouse Event

參考資訊：
https://board.flatassembler.net/

WM_MOUSEMOVE

fwKeys = wParam;       // key flags
xPos = LOWORD(lParam); // horizontal position of cursor
yPos = HIWORD(lParam); // vertical position of cursor

main.asm

    include "head.asm" 
 
    section ".text" code readable executable
proc WndProc hWnd, uMsg, wParam, lParam
    local x:DWORD
    local y:DWORD
 
    mov eax, [uMsg]
    cmp eax, WM_MOUSEMOVE
    je .handle_mouse
    cmp eax, WM_CLOSE
    je .handle_close
    cmp eax, WM_DESTROY
    je .handle_destroy
    invoke CallWindowProc, [pDefWndProc], [hWnd], [uMsg], [wParam], [lParam]
    jmp .finish
  
.handle_mouse:
    mov eax, [lParam]
    and eax, 0ffffh
    mov [x], eax
 
    mov eax, [lParam]
    shr eax, 16
    and eax, 0ffffh
    mov [y], eax
    invoke wsprintf, szBuf, FMT_MOUSE, [x], [y]
    invoke SetWindowText, [hWnd], szBuf
    xor eax, eax
    jmp .finish
  
.handle_close:
    invoke DestroyWindow, [hWnd]
    xor eax, eax
    jmp .finish
   
.handle_destroy:
    invoke PostQuitMessage, 0
    xor eax, eax
    jmp .finish
    
.finish:
    ret
endp
   
proc WinMain hInst, hPrevInst, CmdLine, CmdShow
    local msg:MSG
   
    invoke CreateWindowEx, WS_EX_LEFT, WC_DIALOG, szName, \
        WS_OVERLAPPEDWINDOW or WS_VISIBLE, 0, 0, 300, 300, NULL, NULL, NULL, NULL
    mov [hWin], eax
   
    invoke SetWindowLong, [hWin], GWL_WNDPROC, WndProc
    mov [pDefWndProc], eax
   
@@:
    lea eax, [msg]
    invoke GetMessage, eax, NULL, 0, 0
    cmp eax, 0
    je @f
    lea eax, [msg]
    invoke DispatchMessage, eax
    jmp @b
@@:
    mov eax, [msg.wParam]
    ret
endp
   
start:
    invoke GetModuleHandle, NULL
    mov [hInstance], eax
    
    invoke GetCommandLine
    mov [pCommand], eax
    
    stdcall WinMain, [hInstance], NULL, [pCommand], SW_SHOWNORMAL
    invoke ExitProcess, eax

Line 23~28：將滑鼠座標顯示在視窗標題

完成