我正在浏览Charles Petzold - Programming Windows（5th Edition）第3章。我有一个错误，说明PlaySound函数未定义。在那里我需要包含某种头文件来使用这个函数？
/*−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−
HELLOWIN.C −− Displays "Hello, Windows 98!" in client area
(c) Charles Petzold, 1998
−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−−*/
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT("HelloWin");
HWND hwnd;
MSG msg;
WNDCLASS wndclass;
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
if (!RegisterClass(&wndclass))
{
MessageBox(NULL, TEXT("This program requires Windows NT!"),
szAppName, MB_ICONERROR);
return 0;
}
hwnd = CreateWindow(szAppName, // window class name
TEXT("The Hello Program"), // window caption
WS_OVERLAPPEDWINDOW, // window style
CW_USEDEFAULT, // initial x position
CW_USEDEFAULT, // initial y position
CW_USEDEFAULT, // initial x size
CW_USEDEFAULT, // initial y size
NULL, // parent window handle
NULL, // window menu handle
hInstance, // program instance handle
NULL); // creation parameters
ShowWindow(hwnd, iCmdShow);
UpdateWindow(hwnd);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}字符串
更多评论：playsound应该是法律的功能基于链接：https://learn.microsoft.com/en-us/previous-versions/dd743680(v=vs.85)
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
HDC hdc;
PAINTSTRUCT ps;
RECT rect;
switch (message)
{
case WM_CREATE:
PlaySound(TEXT("HelloWin.wav"), NULL, SND_FILENAME | SND_ASYNC);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
GetClientRect(hwnd, &rect);
DrawText(hdc, TEXT("Hello, Windows 98!"), -1, &rect,
DT_SINGLELINE | DT_CENTER | DT_VCENTER);
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}型
2条答案
按热度按时间cpjpxq1n1#
链接到库并包含头文件：
字符串
pwuypxnk2#
这是一个很好的代码示例，用于播放当前现代API中没有提到的声音。这是为想要使用此代码的用户准备的：
Chap02的Petold代码包含这部分代码：这里我们有两个字符串用于播放
sound( file name, ...)和DrawText(hdc, "text to draw") .... )这需要修改const char = oldansii字符串类型的两个字符串。1.如前所述，使用
TEXT("solved the problem")错误状态LPCWSTR L(..)，type，哪个不起作用？但TEXT确实起作用，并与标题一起编译，如回复中所述。1.第二个字符串错误要求使用'DrawTextW（）'现在放置
LPCWSTR L(...)，没有工作。DrawTextW(hdc, LPCWSTR ( "My First Window" )确实接受了，'LPCWSTR（“...”）, but without ,....L（“...”）`，代码是从Chap02文件中读取的.c，并使用“写字板”作为文本文件打开，因为它没有长文本的分页，然后应用于编译的winproc...
字符串