如何在 WndProc 中处理 char 的 key_down 和 key_up？

Question

我正在尝试处理箭头键和A、W、S、D 字符的向上和向下键消息。

我可以使用WM_KEYUP和WM_KEYDOWN处理箭头键的向上和向下行为。

但是当我尝试处理上述字符的上下行为时，它无法正常工作。

我试过WM_KEYUP和WM_KEYDOWN来处理字符。但是在我将它们更改为WM_CHAR 和WM_DEADCHAR 之后。但是还是不行。

对于字符我可以处理前几个按键向下和向上消息，然后程序不处理这些。 但是对于方向键，程序可以正常运行。

我是新手，不知道如何处理角色的上下行为。

下面是我试过的最后一个代码（只是WndProc函数）。

LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam) {
    switch (uMsg)
    {
    case WM_CREATE:
        Hmainbmp = CreateWindowEx(0, "STATIC", "", WS_CHILD | WS_VISIBLE | SS_BITMAP | WS_THICKFRAME, 1, 23, WINDOW_WIDTH, WINDOW_HEIGHT, hWnd, nullptr, hInst, nullptr);
        start_game();
        break;

    case WM_CHAR:
        PRESSED_KEY = (int)wParam;
        if (PRESSED_KEY == 'A' or PRESSED_KEY == 'a') { players[1]->moves.left = true; }
        else if (PRESSED_KEY == 'D' or PRESSED_KEY == 'd') { players[1]->moves.right = true; }
        else if (PRESSED_KEY == 'W' or PRESSED_KEY == 'w') { players[1]->moves.up = true; }
        else if (PRESSED_KEY == 'S' or PRESSED_KEY == 's') { players[1]->moves.down = true; }
        break;

    case WM_DEADCHAR:
        PRESSED_KEY = (int)wParam;
        if (PRESSED_KEY == 'A' or PRESSED_KEY == 'a') { players[1]->moves.left = false; }
        else if (PRESSED_KEY == 'D' or PRESSED_KEY == 'd') { players[1]->moves.right = false; }
        else if (PRESSED_KEY == 'W' or PRESSED_KEY == 'w') { players[1]->moves.up = false; }
        else if (PRESSED_KEY == 'S' or PRESSED_KEY == 's') { players[1]->moves.down = false; }
        break;

    case WM_KEYDOWN:
        PRESSED_KEY = (int)wParam;
        if      (PRESSED_KEY == VK_LEFT)    { players[0]->moves.left    = true; }
        else if (PRESSED_KEY == VK_RIGHT)   { players[0]->moves.right   = true; }
        else if (PRESSED_KEY == VK_UP)      { players[0]->moves.up      = true; }
        else if (PRESSED_KEY == VK_DOWN)    { players[0]->moves.down    = true; }
        break;
    case WM_KEYUP:
        RELEASED_KEY = (int)wParam;
        if      (RELEASED_KEY == VK_LEFT)   { players[0]->moves.left    = false; }
        else if (RELEASED_KEY == VK_RIGHT)  { players[0]->moves.right   = false; }
        else if (RELEASED_KEY == VK_UP)     { players[0]->moves.up      = false; }
        else if (RELEASED_KEY == VK_DOWN)   { players[0]->moves.down    = false; }
        break;
    
    case WM_DESTROY:
        PostQuitMessage(0);
        break;

    default:
        return(DefWindowProc(hWnd, uMsg, wParam, lParam));
    }

    return(0L);
}

start_game() 是我的主要功能，我在该功能中使用键的向上和向下消息。

我的问题是，如何处理 A、D 等字符的按键和按键行为？

---

在我按下A 或W 后，程序无法处理这些字符的按键行为以及任何其他字符的按键行为，例如S 和D。但同时程序可以处理方向键的上下行为。

---

FULL CODE (Vs2019)

Answer 1

根据WM_DEADCHAR：

WM_DEADCHAR 指定由死键生成的字符代码。一个死人 key 是生成字符的键，例如变音符号 （双点），即与另一个字符组合形成一个 复合字符。

所以WM_DEADCHAR 消息不是您认为对应WM_CHAR 消息的内容。

也可以使用WM_KEYDOWN/WM_KEYUP消息来处理字符键：

case WM_KEYDOWN:
    PRESSED_KEY = (int)wParam;
    if      (PRESSED_KEY == VK_LEFT)    { players[0]->moves.left    = true; }
    else if (PRESSED_KEY == VK_RIGHT)   { players[0]->moves.right   = true; }
    else if (PRESSED_KEY == VK_UP)      { players[0]->moves.up      = true; }
    else if (PRESSED_KEY == VK_DOWN)    { players[0]->moves.down    = true; }
    if (PRESSED_KEY == 'A' or PRESSED_KEY == 'a') { players[1]->moves.left = true; }
    else if (PRESSED_KEY == 'D' or PRESSED_KEY == 'd') { players[1]->moves.right = true; }
    else if (PRESSED_KEY == 'W' or PRESSED_KEY == 'w') { players[1]->moves.up = true; }
    else if (PRESSED_KEY == 'S' or PRESSED_KEY == 's') { players[1]->moves.down = true; }
    break;
case WM_KEYUP:
    RELEASED_KEY = (int)wParam;
    if      (RELEASED_KEY == VK_LEFT)   { players[0]->moves.left    = false; }
    else if (RELEASED_KEY == VK_RIGHT)  { players[0]->moves.right   = false; }
    else if (RELEASED_KEY == VK_UP)     { players[0]->moves.up      = false; }
    else if (RELEASED_KEY == VK_DOWN)   { players[0]->moves.down    = false; }
    if (RELEASED_KEY == 'A' or RELEASED_KEY == 'a') { players[1]->moves.left = false; }
    else if (RELEASED_KEY == 'D' or RELEASED_KEY == 'd') { players[1]->moves.right = false; }
    else if (RELEASED_KEY == 'W' or RELEASED_KEY == 'w') { players[1]->moves.up = false; }
    else if (RELEASED_KEY == 'S' or RELEASED_KEY == 's') { players[1]->moves.down = false; }
    break;