Function name: DdeQueryString

Defined in : User32

Requirements : Windows NT 3.1 or later; Windows 95 or later

Declaration:

Declare Function DdeQueryString Lib "user32" Alias "DdeQueryStringA" (ByVal idInst As Long, ByVal hsz As Long, ByVal psz As String, ByVal cchMax As Long, ByVal iCodePage As Long) As Long

Parameters:

* idInst Specifies the application instance identifier obtained by a previous call to the DdeInitialize function. * hsz Identifies the string to copy. This handle must have been created by a previous call to the DdeCreateStringHandle function. * psz Points to a buffer that receives the string. To obtain the length of the string, this parameter should be set to NULL. * cchMax Specifies the length, in characters, of the buffer pointed to by the psz parameter. If the string is longer than (cchMax - 1), it will be truncated. If the psz parameter is set to NULL, this parameter is ignored. * iCodePage Specifies the code page used to render the string. This value should be either CP_WINANSI or CP_WINUNICODE.

Returns:

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.

Related functions:

Examples:

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