Snippets
From SpenchWiki
- Use !! to ensure that any overloaded operators used to evaluate an expression do NOT end up at operator ||
- Invalid Window filename chars
/ \ : ? * " < > |
- Change default file mode
#include "stdlib.h"
#include <fcntl.h>
/*extern "C" int */_fmode = _O_WTEXT;
_fmode = _O_BINARY;
- fopen 'fmode': ANSI, UTF-8, UTF-16LE, and UNICODE
",ccs=UNICODE"
#include <fcntl.h>
_O_TEXT, _O_BINARY, _O_WTEXT, _O_U16TEXT, _O_U8TEXT
- Unicode in text files (auto-read in fopen.c)
UTF-16 BOM: FF FE UTF-8 BOM: ? ? ? "\r\n" (0x0D, 0x0A) (CRLF)
- MFC filecore.cpp helpers
AfxGetModuleShortFileName
AfxGetFileTitle
AfxComparePath
AfxGetRoot
AfxFullPath
AfxResolveShortcut
AfxGetInProcServer
AfxStringFromCLSID
AFX_COM::CreateInstance
AFX_COM::GetClassObject
- Keydown detection
(GetAsyncKeyState(VK_SHIFT) & (1 << 15))
- CTreeCtrl hit-test
void OnNMClickTreeDirectories(NMHDR *pNMHDR, LRESULT *pResult)
{
CPoint point;
GetCursorPos(&point);
UINT nFlags;
m_cntrlTree_Dirs.ScreenToClient(&point);
HTREEITEM hItem = m_cntrlTree_Dirs.HitTest(point, &nFlags);
if (nFlags & TVHT_ONITEMSTATEICON)
{
m_cntrlTree_Dirs.GetItemData(hItem);
}
}
- TrackPopupMenu
CMenu menu;
menu.LoadMenu(MAKEINTRESOURCE(IDR_MENU));
CMenu* pMenu = menu.GetSubMenu(2);
ASSERT(pMenu);
CPoint point;
::GetCursorPos(&point);
pMenu->TrackPopupMenu(TPM_LEFTALIGN | TPM_LEFTBUTTON, point.x, point.y, this);
- WM_COMMAND
wParam
The high-order word specifies the notification code if the message is from a control. If the message is from an accelerator, this value is 1. If the message is from a menu, this value is zero. The low-order word specifies the identifier of the menu item, control, or accelerator.
lParam
Handle to the control sending the message if the message is from a control. Otherwise, this parameter is NULL.
- TN020: ID Naming and Numbering Conventions
- By convention, the ID value of 0 is not used.
- Windows implementation limitations restrict true resource IDs to be less than or equal to 0x7FFF.
- MFC's internal framework implementations reserve several ranges: 0xE000->0xEFFF and 0x7000->0x7FFF.
- Several Windows system commands use the range of 0xF000 -> 0xFFFF.
- Control IDs of 1->7 are reserved by IDOK, IDCANCEL, and so on.
- The range of 0x8000->0xFFFF for strings is reserved for menu prompts for commands.
SHAutoComplete(hwndEdit, dwFlags);
- Menu utilities
GetMenuPosFromID
- Shell Colour utilities
ColorAdjustLuma
ColorHLSToRGB
ColorRGBToHLS
- _CrtSetDebugFillThreshold
- File Management Functions
GetBinaryType
SHGetFileInfo
- Thread naming
typedef struct tagTHREADNAME_INFO
{
DWORD dwType; // must be 0x1000
LPCSTR szName; // pointer to name (in user address space)
DWORD dwThreadID; // thread ID (-1 = caller thread)
DWORD dwFlags; // reserved for future use, must be zero
} THREADNAME_INFO;
void SetThreadName( DWORD dwThreadID, LPCSTR szThreadName )
{
THREADNAME_INFO info;
info.dwType = 0x1000;
info.szName = szThreadName;
info.dwThreadID = dwThreadID;
info.dwFlags = 0;
__try
{
RaiseException( 0x406D1388, 0,
sizeof(info) / sizeof(DWORD),
(DWORD*)&info );
}
__except( EXCEPTION_CONTINUE_EXECUTION ) {
}
}
// Example usage:
SetThreadName(-1, "Main thread");
- Creating a crash dump
#include <dbghelp.h>
#include <shellapi.h>
#include <shlobj.h>
int GenerateDump(EXCEPTION_POINTERS* pExceptionPointers)
{
BOOL bMiniDumpSuccessful;
WCHAR szPath[MAX_PATH];
WCHAR szFileName[MAX_PATH];
WCHAR* szAppName = L"AppName";
WCHAR* szVersion = L"v1.0";
DWORD dwBufferSize = MAX_PATH;
HANDLE hDumpFile;
SYSTEMTIME stLocalTime;
MINIDUMP_EXCEPTION_INFORMATION ExpParam;
GetLocalTime( &stLocalTime );
GetTempPath( dwBufferSize, szPath );
StringCchPrintf( szFileName, MAX_PATH, L"%s%s", szPath, szAppName );
CreateDirectory( szFileName, NULL );
StringCchPrintf( szFileName, MAX_PATH, L"%s%s\\%s-%04d%02d%02d-%02d%02d%02d-%ld-%ld.dmp",
szPath, szAppName, szVersion,
stLocalTime.wYear, stLocalTime.wMonth, stLocalTime.wDay,
stLocalTime.wHour, stLocalTime.wMinute, stLocalTime.wSecond,
GetCurrentProcessId(), GetCurrentThreadId());
hDumpFile = CreateFile(szFileName, GENERIC_READ|GENERIC_WRITE,
FILE_SHARE_WRITE|FILE_SHARE_READ, 0, CREATE_ALWAYS, 0, 0);
ExpParam.ThreadId = GetCurrentThreadId();
ExpParam.ExceptionPointers = pExceptionPointers;
ExpParam.ClientPointers = TRUE;
bMiniDumpSuccessful = MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(),
hDumpFile, MiniDumpWithDataSegs, &ExpParam, NULL, NULL);
return EXCEPTION_EXECUTE_HANDLER;
}
void SomeFunction()
{
__try
{
int *pBadPtr = NULL;
*pBadPtr = 0;
}
__except(GenerateDump(GetExceptionInformation()))
{
}
}
- Wildcard comparison
int wildcmp(const char *wild, const char *string) {
// Written by Jack Handy - jakkhandy@hotmail.com
const char *cp = NULL, *mp = NULL;
while ((*string) && (*wild != '*')) {
if ((*wild != *string) && (*wild != '?')) {
return 0;
}
wild++;
string++;
}
while (*string) {
if (*wild == '*') {
if (!*++wild) {
return 1;
}
mp = wild;
cp = string+1;
} else if ((*wild == *string) || (*wild == '?')) {
wild++;
string++;
} else {
wild = mp;
string = cp++;
}
}
while (*wild == '*') {
wild++;
}
return !*wild;
}
- Reading hexidecimal
_tcstoul(str, ?, radix)
- gluUnProject
CVector3 GetOGLPos(int x, int y)
{
GLint viewport[4];
GLdouble modelview[16];
GLdouble projection[16];
GLfloat winX, winY, winZ;
GLdouble posX, posY, posZ;
glGetDoublev( GL_MODELVIEW_MATRIX, modelview );
glGetDoublev( GL_PROJECTION_MATRIX, projection );
glGetIntegerv( GL_VIEWPORT, viewport );
winX = (float)x;
winY = (float)viewport[3] - (float)y;
glReadPixels( x, int(winY), 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT, &winZ );
gluUnProject( winX, winY, winZ, modelview, projection, viewport, &posX, &posY, &posZ);
return CVector3(posX, posY, posZ);
}
- Time format
%d/%m/%Y %H:%M:%S
- Float format
%.*g
If the precision specification is an asterisk (*), an int argument from the argument list supplies the value. The precision argument must precede the value being formatted in the argument list.
- Conditional include
The __if_exists and __if_not_exists statements allow you to conditionally include code depending on the existence of a symbol.
- ChildWindowFromPoint
HWND AFXAPI _AfxChildWindowFromPoint(HWND hWnd, POINT pt)
{
ASSERT(hWnd != NULL);
// check child windows
::ClientToScreen(hWnd, &pt);
HWND hWndChild = ::GetWindow(hWnd, GW_CHILD);
for (; hWndChild != NULL; hWndChild = ::GetWindow(hWndChild, GW_HWNDNEXT))
{
if (_AfxGetDlgCtrlID(hWndChild) != (WORD)0 &&
(::GetWindowLong(hWndChild, GWL_STYLE) & WS_VISIBLE))
{
// see if point hits the child window
CRect rect;
::GetWindowRect(hWndChild, rect);
if (rect.PtInRect(pt))
return hWndChild;
}
}
return NULL; // not found
}
- Struct-array initialisation
AFX_STATIC_DATA CRITICAL_SECTION _afxResourceLock[CRIT_MAX] = { { 0 } };
- MFC-TLS <afxtls_.h>
CSimpleList
CTypedSimpleList
CThreadSlotData
CNoTrackObject
CProcessLocalObject
CThreadLocal<TYPE>::GetData
CProcessLocal<TYPE>::GetData
- Adjusting CRT SxS version:
/***
*crtassem.h - Libraries Assembly information
*
* Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
* This file has information about Libraries Assembly version.
*
* [Public]
*
****/
#pragma once
#ifndef _VC_ASSEMBLY_PUBLICKEYTOKEN
#define _VC_ASSEMBLY_PUBLICKEYTOKEN "1fc8b3b9a1e18e3b"
#endif
#ifndef _CRT_ASSEMBLY_VERSION
#if defined _USE_RTM_VERSION
#define _CRT_ASSEMBLY_VERSION "8.0.50608.0"
#else
#define _CRT_ASSEMBLY_VERSION "8.0.50727.762"
#endif
#endif
#ifndef __LIBRARIES_ASSEMBLY_NAME_PREFIX
#define __LIBRARIES_ASSEMBLY_NAME_PREFIX "Microsoft.VC80"
#endif
