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Win32

The term Win32 is used in various contexts.

By Win32 a family of 32-bit Windows operating systems for the architecture x86 is understood.

When one speaks about a Win32-application, you should understand that one means a 32-bit program to be executed in the 32-bit environment and that has the ILP32 data model.

By Win32 a 32-bit API is also understood which is provided by the 32-bit Windows operating system.

There is a subsystem WoW64 on new 64-bit Windows systems to provide compatibility with obsolete 32-bit applications. The system translates the calls of the 32-bit API into the calls of the 64-bit API, redirects requests when working with the register and files and performs some other functions.

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Qt

C++ 
int gx = gm.x.toInt();
int gy = gm.y.toInt();
int iw = gm.width.toInt();
int ih = gm.height.toInt();
if (iw <= 0 || iw <= 0)
  return 0;

UnrealEngine

C++ 
switch ( BlendMode )
{
case Opaque:
  BackgroundColor.A = 1.0f;
case Masked:
  BackgroundColor.A = 0.0f;
}

Xamarin

C# 
get {
  return Left == 0 &&
         Top == 0 &&
         Right == 0 &&
         Left == 0;
}

Chromium

C++ 
void Explode(bool is_local,
  Exploded* exploded) const
{
  ....
  ZeroMemory(
    exploded,
    sizeof(exploded));
  ....
}

Qt

C++ 
int gx = gm.x.toInt();
int gy = gm.y.toInt();
int iw = gm.width.toInt();
int ih = gm.height.toInt();
if (iw <= 0 || iw <= 0)
  return 0;

UnrealEngine

C++ 
switch ( BlendMode )
{
case Opaque:
  BackgroundColor.A = 1.0f;
case Masked:
  BackgroundColor.A = 0.0f;
}

Xamarin

C# 
get {
  return Left == 0 &&
         Top == 0 &&
         Right == 0 &&
         Left == 0;
}

Chromium

C++ 
void Explode(bool is_local,
  Exploded* exploded) const
{
  ....
  ZeroMemory(
    exploded,
    sizeof(exploded));
  ....
}
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