The DdeQueryString function copies text associated with a string handle into a buffer.
DWORD DdeQueryString(
DWORD idInst, |
// instance identifier |
HSZ hsz, |
// handle to string |
LPTSTR psz, |
// pointer to destination buffer |
DWORD cchMax, |
// length of buffer |
int iCodePage |
// code page identifier |
); |
If the psz parameter specified a valid pointer, the return value is the length, in characters, of the returned text (not including the terminating null character). If the psz parameter specified a NULL pointer, the return value is the length of the text associated with the hsz parameter (not including the terminating null character). If an error occurs, the return value is 0L.
The string returned in the buffer is always null-terminated. If the string is longer than (cchMax - 1), only the first (cchMax - 1) characters of the string are copied.
If the psz parameter is NULL, the DdeQueryString function obtains the length, in bytes, of the string associated with the string handle. The length does not include the terminating null character.
DdeCmpStringHandles, DdeCreateStringHandle, DdeFreeStringHandle, DdeInitialize
file: /Techref/os/win/api/win32/func/src/f14_5.htm, 4KB, , updated: 2000/4/7 12:19, local time: 2024/9/2 16:07,
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