WriteFile() from Module
BlitzMax Forums/BlitzMax Programming/WriteFile() from Module
| ||
| When calling the windows function WriteFile(handle, buffer, size, buffer, 0) from a BMX I am getting the error ERROR_ACCESS_DENIED is this a BUG? seems to work fine when using the same code from Blitz3D! using userlibs Strict Extern "win32" Function GetCommState:Int( handle:Int, DCB:Byte Ptr ) Function SetCommState( handle:Int, DCB:Byte Ptr ) Function BuildCommDCBA:Int( config:Byte Ptr, DCB:Byte Ptr ) Function GetCommTimeouts:Int( handle:Int, Timeouts:Byte Ptr ) Function SetCommTimeouts:Int( handle:Int, Timeouts:Byte Ptr ) Function CreateFileA:Int( filename:Byte Ptr, DesiredAccess:Int, ShareMode:Int, SecurityAttribute:Int, CreationDistribution:Int, FlagsAndAttributes:Int, TemplateFile:Int ) Function CloseHandle:Int( handle:Int ) Function WriteFile:Int( handle:Int, pBuffer:Byte Ptr, NumberOfBytesToWrite:Int, pNumberOfBytesWritten:Byte Ptr, pOverlapped:Int ) Function ReadFile:Int( handle:Int, pBuffer:Byte Ptr, NumberOfBytesToRead:Int, pNumberOfBytesRead:Byte Ptr, pOverlapped:Int ) Function GetLastError:Int() Function FormatMessage:Int( dwFlags:Int=$100,lpSource:Byte Ptr, dwMessageId:Int, dwLanguageId:Int, lpBuffer:Byte Ptr, nSize:Int ) End Extern Const GENERIC_READ = $80000000 Const GENERIC_WRITE = $40000000 Const OPEN_EXISTING = 3 Const FILE_ATTRIBUTE_NORMAL = $80 Const INVALID_HANDLE_VALUE = -1 Global temp:String = "COM1" Global buffer:TBank = CreateBank(1024) Global count:TBank = CreateBank(4) Global handle = CreateFileA( temp.ToCString(), GENERIC_READ Or GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0 ) PokeByte(buffer,0,1) Print "WRITE " + WriteFile( handle, BankBuf(buffer), 1, BankBuf(count), 0 ) Print GetLastError() 'ACCESS DENIED ERROR HERE CloseHandle(handle) WaitKey() End |
| ||
| Or is no longer a binary operator in BlitzMax (it's now logical), try the | operator instead (generic_read|generic_write). |
| ||
| thanks, spot on. now I can release the comm module for blitz max :-) |
   |