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Page 471 Oleaut32.dll, 284 OLECHAR, 240 Ole32.dll, 284 OLEDragDrop, 138 OLEDraw, 125, 127128 OleDraw, 251254 OLEDropMode, 137 OLESTR, 240 OpenSCManager, 398, 405415 OpenSCManagerA, 405415 OpenService, 399, 408409 operating system versions, 3437 operators &, 347 AddressOf, 90, 349 AND, 231, 299, 304306 C (language) cast, 167 Enum, 403404 exponentiation, 231 mod, 231 NOT, 231, 299 ObjPtr, 357 OR, 107, 134, 204, 231, 299, 301304 shift, 231 StrPtr, 108, 214, 245 ByVal, 155 VarPtr, 183n, 187, 203, 210, 224, 245, 295, 430 to obtain address of variable, 336 XOR, 299, 300, 307308 Option Explicit, 910 OR, 107, 134, 204, 231, 299, 301304 ordinal number, 380 OriginalStates collection, 416, 417 OSVERSIONINFO, 35, 172173 out (prefix), 249 overflow errors, 315, 355 P P, 350 packing, 82, 207, 215, 260261, 315, 369 parameter types checking, 8 forgetting to specify, 186 IUnknown*, 252 IUnknown**, 252 LPCOLESTR, 240 LPCSTR, 240, 260 LPCTSTR, 199 LPDWORD, 200 LPOLESTR*, 122, 244 LPSTR, 47, 240 LPTSTR, 47, 200 PDEVMODE, 204 parameter values, checking, 10 parameters, 249250 callback, 110111, 220, 234235 CLSID, 249 containing zero, 10 declared as arrays, 171 declared As Object, 252 declared By Reference, 181 declared ByVal, 187 detecting errors in, 152153 DEVMODE, 41, 75 DLL, 368 DWORD, 407 FILEOP_FLAGS, 134 function, 180 hdc, 18, 26, 28, 155 hidden, 255 HiddenStruct, 257 how placed in stacks, 332343 invalid, 161 Long, 167 lParam, 333, 334 LPDWORD, 407 LPHRASCONN, 88 LPOLESTR, 246 LPRADIALEXTENSIONS, 88 NULL, 181 passing by reference, 160, 330331 passing by value, 330331 passing empty strings as, 152153 passing pointers as, 152 passing to a function, 320321 passing values of handle as, 155 PBYTE, 104 REFCLSID, 244 SC_HANDLE, 407 sizes when passed on stack, 328 stack, 183 string, 340343 that are pointers, 65 that handle mutliple data types, 193 of type Long, 181 used by OLE functions, 124 userdefined types as, 120 variant, 186187 vbNullString, 55 WORD, 66 See also declarations; string parameters parity checking, 313 passing an address explictly, 187 a control as a parameter to a function, 252 first elements of arrays, 171 IDI_ASTERISK, 166, 167 multiple strings in a buffer, 136 NULL value, 152153, 181
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