Dev C++ Const


Dispatches a message to a window procedure. It is typically used to dispatch a message retrieved by the GetMessage function.



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AFAICT that syntax error is because you haven't included the header = needed for the pair template class. Add: #include Hope this helps, Jason. Constants refer to fixed values that the program may not alter during its execution. These fixed values are also called literals. Constants can be of any of the basic data types like an integer constant, a floating constant, a character constant, or a string literal. There are enumeration constants as well.


Type: const MSG*

Dev C++ Const

A pointer to a structure that contains the message.

Return value

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The return value specifies the value returned by the window procedure. Although its meaning depends on the message being dispatched, the return value generally is ignored.


Dev C++ Const

The MSG structure must contain valid message values. If the lpmsg parameter points to a WM_TIMER message and the lParam parameter of the WM_TIMER message is not NULL, lParam points to a function that is called instead of the window procedure.

Note that the application is responsible for retrieving and dispatching input messages to the dialog box. Most applications use the main message loop for this. However, to permit the user to move to and to select controls by using the keyboard, the application must call IsDialogMessage. For more information, see Dialog Box Keyboard Interface.


For an example, see Creating a Message Loop.

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Minimum supported clientWindows 2000 Professional [desktop apps only]
Minimum supported serverWindows 2000 Server [desktop apps only]
Target PlatformWindows
Headerwinuser.h (include Windows.h)
API setext-ms-win-ntuser-message-l1-1-0 (introduced in Windows 8)

See also

Dev C++ Const



Dev C++ Install For Windows10


Microsoft Specific

The limits for integer types in C and C++ are listed in the following table. These limits are defined in the C standard header file <limits.h>. The C++ Standard Library header <limits> includes <climits>, which includes <limits.h>.

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Microsoft C also permits the declaration of sized integer variables, which are integral types of size 8-, 16-, 32- or 64-bits. For more information on sized integers in C, see Sized Integer Types.

Limits on Integer Constants

CHAR_BITNumber of bits in the smallest variable that is not a bit field.8
SCHAR_MINMinimum value for a variable of type signed char.-128
SCHAR_MAXMaximum value for a variable of type signed char.127
UCHAR_MAXMaximum value for a variable of type unsigned char.255 (0xff)
CHAR_MINMinimum value for a variable of type char.-128; 0 if /J option used
CHAR_MAXMaximum value for a variable of type char.127; 255 if /J option used
MB_LEN_MAXMaximum number of bytes in a multicharacter constant.5
SHRT_MINMinimum value for a variable of type short.-32768
SHRT_MAXMaximum value for a variable of type short.32767
USHRT_MAXMaximum value for a variable of type unsigned short.65535 (0xffff)
INT_MINMinimum value for a variable of type int.-2147483647 - 1
INT_MAXMaximum value for a variable of type int.2147483647
UINT_MAXMaximum value for a variable of type unsigned int.4294967295 (0xffffffff)
LONG_MINMinimum value for a variable of type long.-2147483647 - 1
LONG_MAXMaximum value for a variable of type long.2147483647
ULONG_MAXMaximum value for a variable of type unsigned long.4294967295 (0xffffffff)
LLONG_MINMinimum value for a variable of type long long.-9,223,372,036,854,775,807 - 1
LLONG_MAXMaximum value for a variable of type long long.9,223,372,036,854,775,807
ULLONG_MAXMaximum value for a variable of type unsigned long long.18,446,744,073,709,551,615 (0xffffffffffffffff)

If a value exceeds the largest integer representation, the Microsoft compiler generates an error.

Dev C++ Constant

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See also